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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 is the difference between chondroblasts and osteoblasts?
Osteoclasts and osteoblasts are both types of osteons or bone cells. They differ in their function. An osteoblast will build bone. You can remember it as as osteo"b"last will "b"uild "b"one. An osteoclast, however, is designed to break down bone that is no longer needed. Or "c"ill bone.
The osteoblast lays down bone matrix, which mineralizes and becomes bone. The osteoclast resorbs bone. The delicate equilibrium between both types of cells is key to the health of the skeletal system. No one is more important, and both have a role to play in maintaining the quantity and quality of bone.
Osteoclasts are giant bone-destroying cells. this process is usually activated by the drop of blood calcium levels that cause the parathyroid glands to release PTH (parathyroid hormone) which activates osteoclasts so they break down osteocytes releasing calcium ions into the blood stream.
Both also work in a process called bone remodeling during normal growth or after changes in the type of stress are exposed to.
It's possible that you may have injured a muscle or possibly a rib during the fall on your dirt bike. The pain returning when you cough could indicate that the muscles in that area are being strained. It's advisable to see a healthcare provider for a proper evaluation and treatment if needed.
Where are half of the body's bone located?
The majority of the bones in your body are your hands and your feet. Your wrist has 8 bones that link to 5 more in your hand, that link to 14 more in your fingers and thumb; total is 27. Your feet also have 7 in your ankle, heel, and midfoot; that connects to 5 more (metatarsals), and 14 in your toes. So between your hands and your feet you have 106 bones.
A sagittal crest is a ridge of bone running along the top of the skull, typically found in certain animal species, like gorillas and some primates. It serves as an attachment site for jaw muscles and aids in chewing tough foods.
Bony lump on forehead believed to be calcified bone How is this removed?
First of all, who is it that 'believes' this lump on your forehead is 'calcified bone'? If it was you or other persons who don't have a medical license, see a doctor. If your doctor believes the lump to be calcified bone, ask your doctor what should be done to remove it.
What is the position of the radius with respect to the ulna during forearm supination?
It is lateral to the Ulna during supination
The skeleton of this part of your body is called the skull?
The part of the skeleton called the skull is the head.
Is ankle a hinge joint or a ball and socket joint?
Ankle is a hinge joint. As it has 'pulley' shaped articular surfaces. Strong medial and lateral ligaments. And permits only two types of movements. Dorsiflexion and planter flex-ion. Movements are allowed in one plane around single axis.
Why do bone have increased calcium and phosphate levels due to exercise?
This is a good question! The calcium and phosphate level increase due to exercise. This is physiological response to stress of exercise. Your bones and muscles develop due to exercise. The bones becomes stronger and stronger as you give more and more stress to them. The stress lines also change as per requirement of the stress. Your bones get weak, when you put a plaster for fracture. This happens due to disuse of the bones.
How is it possible that a human baby and a giraffe have the same number of bones in the neck?
Like almost all mammals, both a human baby and a girrafe have seven cervical vertebrae (bones in the neck). You asked "how is it possible" and the answer would deal with mother nature, natural selection and survivability. Seven bones in the neck works just fine for survival and difernet mammal species adapted the SIZE of those bones depending on their needs. see the related link below for more info about giraffes
Which bone type has the least amount of spongy bone relative to its total volume?
Long bones have the least amount of spongy bone relative to their total volume. Long bones, such as the femur or humerus, have a dense outer layer of compact bone with minimal spongy bone located at the ends.
What are the superficial bones of the face?
Facial bones in humans are Mandible - lower jaw bone. Maxillae - fuse in the midline to form the upper jaw, including he front part of the upper palate, each Maxilla contains a lrge air space. Zygomatic - form prominences of the cheeks. Nasal bones - Lie side by side forming the bridge of the nose. Lacrimal bones - About the size of finger nails
The percentage goes up. (Hematocrit is the percentage of red blood cells in a sample of whole blood, so if an elevated number of red blood cells is produced by your bone marrow, your hematocrit level should rise).
What features of knee joint structure help minimize friction between the thigh bone and leg bone?
The cartilage and fiberous tissue create an impact zone and the fatty materials there lubricate the mechanical hinge of the bones. The joint structure itself however holds no friction reduction, it is the secondary structure of soft tissues that do all of the protection.
What type of joints are located in the cranium of the skull?
Humans have fixed joints in their craniums. That means they are immovable. They were once not completely fused together in order for the infant to get through the birth canal, but now they form one complete shell over your brain for protection.
save the scarecrows
How many pairs of ribs would the normal human have?
Twelve pair is the norm, but about 5% have one or more extra ribs.
Bone is made up of an organic part and an inorganic part.
- Organic - this is also known as the osteoid. It consists of 90% collagen and other specialised proteins such as osteocalcin and osteonectin. It gives the bone a degree of flexibility.
- Inorganic - this is made up predominantly of a compound called hydroxyapatite, an inorganic molecule made up of calcium, phosphate and hydroxyl groups. It forms salts other ions such as bicarbonate, potassium and sodium ions. This gives the bone its strength and resistance to damage.
Almost every bone in your body is made of the same materials:
- The outer surface of bone is called the periosteum (say: pare-ee-OS-tee-um). It's a thin, dense membrane that contains nerves and blood vessels that nourish the bone.
- The next layer is made up of compact bone. This part is smooth and very hard. It's the part you see when you look at a skeleton.
- Within the compact bone are many layers of cancellous(say: KAN-sell-us) bone, which looks a bit like a sponge. Cancellous bone is not quite as hard as compact bone, but it is still very strong.
- In many bones, the cancellous bone protects the innermost part of the bone, the bone marrow (say: MAIR-oh). Bone marrow is sort of like a thick jelly, and its job is to make blood cells.
What are the benefits of A positive blood group?
From what I read recently is that people with blood type A shouldn't eat meat and allot of white bread or starches like rice. Type is is a thicker type of blood hence more time fir plaque build up. I know its depressing! I'm 29 years old and physically fit, and have always thought i ate pretty healthy but I was wrong. Doc says i got crazy high cholesterol, now I'm dieting.
What hormones control calcium balance between bone and blood?
Parathyroid hormone (PTH) and calcitonin are the two main hormones that regulate calcium balance between bone and blood. PTH increases blood calcium levels by stimulating bone resorption and increasing calcium reabsorption in the kidney, while calcitonin decreases blood calcium levels by inhibiting bone resorption.
Does a bone xray show up arthritis?
A bone x-ray can show signs of arthritis, such as joint space narrowing or bone spurs. However, it may not always be the most sensitive imaging modality for detecting early stages of arthritis, as changes in bone may not be as pronounced in the initial phases. Other imaging techniques like MRI or ultrasound may provide more detail in such cases.
Shoulder girdle bone that articulates with and transmits forces to the bony thorax?
The clavicle is the shoulder girdle bone that articulates with and transmits forces to the bony thorax. It acts as a strut connecting the scapula to the sternum, allowing for movement and stability of the shoulder joint, as well as helping to transfer forces from the upper limb to the axial skeleton.
What are the tiny bones bearing tear ducts?
The tiny bones that bear the tear ducts are the lacrimal bones. They are located at the inner corner of each eye socket and help to form part of the eye socket and tear duct system. The tear ducts are responsible for draining tears from the eyes into the nasal cavity.
A skeleton that is found on the outside of a body is called an exoskeleton. These can also be manmade objects that assist humans. Exoskeletons have been developed to help paralyzed individuals to walk. They have also been developed to help increase the strength of an individual, allowing that individual to lift weight that is far beyond the capability of a normal being.
