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Skeletal System
The skeletal system provides definite shape and mechanical support to the body, and it also helps in movement and locomotion. Ask questions about the skeletal system and bones here.
14,490 Questions
What Ribs are attach individually to the sternum by way of the coastal cartilage?
Ribs 8 to 10 are attached individually to the sternum by way of the costal cartilage. Ribs 1 to 7 are attached directly to the sternum, while ribs 11 and 12 are floating ribs without any attachment to the sternum.
Bone is considered anisotropic because it responds differently if forces are applied in different directions. Bone can handle large forces applied in the longitudinal plane (tension and compression); bone is not as strong in handling forces applied transversely across its surface.
The differences between the properties of the cancellous and cortical bone contribute to the anisotropy of the bone. Cancellous bone provides bending strength, and cortical bone provides significant compressive strength.
In symphysis joints the articular surfaces of the bones are covered with?
In symphysis joints, the articular surfaces of the bones are covered with hyaline cartilage and fibrocartilage. The fibrocartilage acts as a shock absorber and provides stability to the joint while the hyaline cartilage allows for smooth movement between the bones.
Second smallest bone in the human body?
Well, darling, the second smallest bone in the human body is the stapes, located in the middle ear. It's about the size of a grain of rice, but don't let its small stature fool you - this little guy plays a big role in transmitting sound vibrations. So, there you have it, the stapes struts its stuff as the second smallest bone in our fabulous human bodies.
Osteogenesis is the process of?
Osteogenesis is the process of bone formation, where new bone tissue is created and developed. It involves the differentiation of osteoblasts, which are specialized cells responsible for building and mineralizing bone. Osteogenesis plays a crucial role in bone growth, repair, and remodeling throughout life.
Name the bones that compose the orbit of the eye?
The bones that form the orbit of the eye are the ethmoid, lacrimal, maxilla, frontal, sphenoid, zygoma, palatine
The orbits are pyramidal, bony cavities in the facial skeleton with their bases (orbital openings) directed anterolaterally and their apices, posteromedially. The orbits contain and protect the eyeballs and their muscles, nerves, and vessels, together with most of the lacrimal apparatus. All space in the orbits not occupied by structures is filled with orbital fat. The fat forms a matrix in which the structures of the orbit are embedded.
The orbit has a base, four walls, and an apex:
The superior wall (roof) is approximately horizontal and is formed mainly by the orbital part of the frontal bone, which separates the orbital cavity from the anterior cranial fossa. Near the apex of the orbit, the superior wall is formed by the lesser wing of the sphenoid. Anterolaterally the lacrimal gland occupies the fossa for the lacrimal gland (lacrimal fossa) in the orbital part of the frontal bone.
The medial wall is formed by the ethmoid bone, along with contributions from the frontal, lacrimal, and sphenoid bones. Anteriorly, the medial wall is indented by the lacrimal groove and fossa for the lacrimal sac. The bone forming the medial wall is paper thin, and the ethmoid air cells are often visible through the bone of a dried cranium.
The lateral wall is formed by the frontal process of the zygomatic bone and the greater wing of the sphenoid. This is the strongest and thickest wall, which is important because it is most exposed and vulnerable to direct trauma. Its posterior part separates the orbit from the temporal lobes of the brain and middle cranial fossae.
The inferior wall (floor) is formed mainly by the maxilla and partly by the zygomatic and palatine bones. The thin inferior wall is shared by the orbit superiorly and the maxillary sinus inferiorly. It slants inferiorly from the apex to the inferior orbital margin. The inferior wall is demarcated from the lateral wall by the inferior orbital fissure.
The apex of the orbit is at the optic canal in the lesser wing of the sphenoid, just medial to the superior orbital fissure.
The bones forming the orbit are lined with periorbita (periosteum of the orbit). The periorbita is continuous at the optic canal and superior orbital fissure with the periosteal layer of dura mater. The periorbita is also continuous over the orbital margins and through the inferior orbital fissure with the periosteum covering the external surface of the cranium (pericranium) and with the orbital septa at the orbital margins, with the fascial sheaths of the extraocular muscles, and with orbital fascia that forms the fascial sheath of the eyeball.
Why do your ribs pop when you stretch?
When you stretch, the ligaments and tendons around your ribs may move, causing a popping sound similar to cracking knuckles. This is generally harmless. If you experience pain or discomfort when your ribs pop during stretching, it's best to consult a healthcare professional.
Which bone marrow transplant uses the patients own bone marrow?
An autologous bone marrow transplant uses the patient's own bone marrow. The bone marrow is collected from the patient, stored, and later reinfused after high-dose chemotherapy or radiation therapy. This type of transplant helps restore the patient's immune system.
What is the backbone material that is not bone?
Cartilage is a flexible connective tissue that serves as the backbone material in the human body, providing structure and support to various body parts. It is found in areas such as the nose, ears, and joints, acting as a cushion and reducing friction between bones.
the composition of bone matrix is 1/3 organic and 2/3 inorganic matter. The organic matter, synthesized by the osteoblasts (bone-forming cells), is collagen and proteins like glycosaminoglycan, proteoglycan, and glycoprotiens. the inorganic matter is mostly crystallized calcium phosphate salts and calcium carbonate, and a few other minerals. bone matrix is a composite which means it has characteristics of of the hard, strong inorganic matter and some flexibility and give from the collagen.
Collective name for the skull bones that encase the brain?
The collective name for the skull bones that encase the brain is the cranium. The cranium consists of several bones, including the frontal, parietal, temporal, occipital, sphenoid, and ethmoid bones. These bones form a protective shell around the brain.
How much pressure can bones take?
"depends on thee bone.
Copperhead_51
"
That's wrong. As long as there would be no gas in something, the thing cannot break under any kind of pressure (unless you have pressure equivalent to a sun or blackhole). At some pressure, chemicals can start to break down, but your bones would still not break.
The patella is what type of bone?
The patella, also known as the kneecap, is a sesamoid bone. This means it is a small, oval-shaped bone embedded within a tendon. Its function is to protect the knee joint and aid in the action of the quadriceps muscle.
Name two nutrients your bones need and how do they help the bones?
Calcium and Vitamin D are two nutrients that bones need. Calcium helps to build and maintain bone strength and structure, while Vitamin D helps the body absorb calcium effectively, promoting healthy bone growth and density.
What organs are protected by the thigh bone?
The thigh bone, also known as the femur, protects the muscles and nerves in the thigh region. It does not directly protect any internal organs.
What are the bones that make up the limbs?
The appendicular skeleton is divided into six major regions:
1) Pectoral Girdles (4 bones) - Left and right Clavicle (2) and Scapula (2).
2) Arm and Forearm (6 bones) - Left and right Humerus (2) (Arm), Ulna (2) and Radius (2) (Fore Arm).
3) Hands (58 bones) - Left and right Carpal (16) (wrist), Metacarpal (10), Proximal phalanges (10), Middle phalanges (8), distal phalanges (10), and sesamoid (4).
4) Pelvis (2 bones) - Left and right OS coxae (2) (ilium).
5) Thigh and leg (8 bones) - Femur (2) (thigh), Tibia (2), patella (2) (knee), and Fibula (2) (leg).
6) Feet (56 bones) - Tarsals (14) (ankle), Metatarsals (10), Proximal phalanges (10), middle phalanges (8), distal phalanges (10), and sesamoid (4).
What two parts make up the back bone of DNA?
The backbone of DNA is made up of repeating units of sugar (deoxyribose) and phosphate molecules. These molecules are connected by covalent bonds to form a sugar-phosphate backbone, with the nitrogenous bases extending from it.
What bone is called the ''funny bone''?
The "funny bone" is not one bone, but the inside joint of the elbow where the upper and lower arm bones are connected. If you hit the sensitive inside of the elbow, it is not "funny" except in the sense that it feels odd or peculiar. You are actually compressing the ulnar nerve that runs down the arm.
The "funny bone" is the extension of the humerus bone (upper arm bone) into the elbow joint with the ulna (larger forearm bone). At the inside of the elbow, the ulnar nerve is located where the olecranon, or upper end of the ulna , meets the epicondyle, or lower end of the humerus. If the joint is struck, there is a tingling (a funny or odd sensation) and sometimes a temporary numbness in the lower arm, because the signals along the ulnar nerve are interrupted.
This has little to do with the name of the upper arm bone being the humerus (humorous), which is the Latin word for "shoulder."
(see related question)
How many bones are there in tarsal?
the bones that make ankle joint are tibia (shin bone), fibula and talus. the rest of the bones listed below are bones of foot
Tarsals: Talus - is the most proximal tarsal bone. It has a smooth, rounded joint surface that articulates with the tibia. Calcaneus - this is the largest, most posterior tarsal, the one that forms the heel. The Achilles tendon attaches to this bone Navicular - is another boat-shaped bone like the carpal of the same name. It is on the medial surface of the foot, just distal to the talus. Cuboid - is a bone that is roughly cube shaped. It lies lateral to the navicular. Cuneiforms first, second and third - are three small stick-like bones. They articulate with the proximal phalanges of the medial three toes. Their identifying numbers increase from medial to lateral like the metatarsals, but don't get their first, second, third designation mixed up with the I, II, III naming of the metatarsals.
Metatarsals: Metatarsals I to V - warning, these bones are numbered differently from the metacarpals. The big toe side (medial) is I and the little toe side is V (lateral). These bones form the anterior part of the arch of the foot.
Phalanges: Proximal phalanges - as in the hand, the foot has 14 phalanges. Again, they are individually identified with a Roman numeral (I-V) and the designations proximal, middle or distal. The proximal phalanges articulate with the metatarsals. Middle phalanges - this one is absent from the big toe. Distal phalanges - these small phalanges are found in the tips of the toes.
There are seven bones that make up the tarsus.
Leg unit between tarsus and femur?
The leg unit between the tarsus and femur is the tibia. The tibia is one of the two bones in the lower leg, along with the fibula. The tibia is located between the femur, which is the thigh bone, and the tarsal bones of the foot.
Yes, bones have a certain amount of flexibility to them.
The bones of an infant are the most "bendable" (pliable) and as we age they slowly replace the collagen that gives them their pliability for non-pliable minerals. As such, the bones of an elderly person are the least pliable, but usually still have some pliability.
What is the difference between a haversian canal and a volkmann's canal?
The haversian canal is the axis of the basic unit of bone, the osteon, and it has longitudinal orientation. The Volkmann`s canal has a transverse orientation and interconnect different Haversian canal between them.
A bone that is longer than it is wide?
A long bone is a bone that is longer than it is wide, such as the femur in the thigh or the humerus in the upper arm. These bones are predominantly found in the limbs and are important for providing structure, support, and movement.
