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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
Do finger and toenails grow from your bone?
ANSWER 1
Finger nails are combination of bone with Keratin, but without tissues or muscles or blood cells, they are formed like a protection layer which are extended from the inner bone but does not continue with the flesh or Finger, but are ttached to Finger.
Same is the reason, one doesn't feel pain while nails are cut but yes once can feel it when it it along with the flesh attaching it
ANSWER 2
Finger nails and toe nails are much more closely related to hair than to bone.
Bone is living tissue which contains nerves and manufactures blood cells.
Hair and nails are only living tissue at the base, where they connect to the skin. The base of a hair is called its "root"; the base of a nail is called its "bed".
All of the hair or nail above its base is dead tissue, being pushed upward by new living growth at the base. You can cut your hair or nails without feeling pain because they are not living tissue and contain no nerves except at their base.
If the atomic radius of aluminum is 0.143 nm calculate the valume of its unit cell in cubic meters?
Wouldn't converting .404 nm to meters be equal to (0.404)/(10^9) = 4.04 x 10^-10 m?
Then that cubed would equal: 6.59 x 10^-29. Am I calculating something wrong?
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When I did this problem, the diagonal of the body-centered cubic ended up being 0.572 nm. Then, with the pythagorean theorem, the edge was .404 nm. When converted to meters, it is 0.003710. This cubed (for volume) is then 5.1 x 10 (to the negative 8 power). <-- answer to question
Which part of the human body has the most bones?
The hands have the most bones -- 27 in each hand. The hands and feet together make up more than half the bones in the human body. There are 206 bones in the human body; 106 of these are in the hands and feet (27 in each hand and 26 in each foot).
What are the functions of tendons?
The function of a tendon is a type of soft tissue that connects muscle tissue to bones just like ligaments that connect two or more bones. The purpose of tendons is to transfer force between muscle and bone.This allows the joint movement that allows for everyday activities like walking or reaching. Tendons can have several shapes ranging from wide and flat, ribbon and fan shaped.
Tendons connect muscles to bones.
There are 26 bones per foot. There are two small bones under the base of the first toe that are called sesamoids. If you count them then the total is 28. Conventionally we refer to it as 26 bones per foot.
Why do bone injuries heal much more rapidly than injuries to cartilage?
Because of the lack of blood supply to cartilage, (a new technique to hasten healing of injuries is to introduce fresh blood flow into the area) whereas the marrow in bones actually produce red blood cells, and bones are actually a honeycomb like structure, and they are constantly being taken apart, and rebuilt, microscopic bit by bit.
What major organs are found in the thoracic cavity?
Pleural cavity: lungs
Pericardial cavity: heart
Mediastinum: heart, esophagus, trachea, diaphragm, thymus gland, aorta
Surrounded by rib cage; backed by spinal vertebrae and scapula.
in mass would be the skull though the skull is really made up of 28 bones that all fuse togther. the top three longest bones in the body are the femur or thigh bone then the tiba or shin bone and then the fibula or lower leg.
No, nails are not bones. Nails are made of a protein called keratin, while bones are rigid organs that make up the skeletal system. Bones provide structure and support to the body, whereas nails protect the ends of the fingers and toes.
The skull can be subdivided into two parts: the cranium and the mandible. A skull that is missing a mandible or lower jaw bone is only a cranium.
the bowl-shaped part of your skull
What causes human infant bones to fuse together as they grow?
Because children have more bones than adults. They is because the bones fuse together when the children are growing. A baby has 300 bones at birth. But because bones fuse together during the "growth period", adults have less bones and they end up with 206 bones.
How many bones in an adult body?
An adult human body typically has 206 bones. These bones provide structure and support for the body, protect internal organs, and aid in movement. Some individuals may have slight variations in the number of bones due to differences in bone structure.
What is the weakest bone in your body?
The strongest bone in your body is your thigh bone (or femur) and is also the largest bone in the human body.
The lacrimal bone, the smallest and most fragile bone of the "face", is situated at the front part of the medial wall of the orbit.
What type of bone is the skull?
The skull is composed of the cranium and the facial bones. They are like all the other bones of the body, except they do not produce blood cells, like long bones and short bones.The cranial bones are flat bones such as the frontal, parietal, temporal, and occipital bones. The facial bones are considered irregular-shaped bones and consist of; sphenoidal, lacrimal, and a few others.
P. What is the combination of the skeletal and muscular systems called?
The combination of the skeletal and muscular systems is called the musculoskeletal system. This system is responsible for providing structure, support, and movement to the body.
Occipital bone is found in what area of the body?
The occipital bone is located on the back of the skull. The occipital protuberance can be seen/felt on the back of the head, as it is the rather large bump. This occipital bone encloses a large oval hole called the foramen magnum which allows the spinal cord to pass through.
backbone and skull. the bones that make up the vertebral column and skull. The skeleton is divided into two portions: Axial and Appendicular. Appendicular is all the bones from the humerus of the arm to the distal-most digits of the fingers and from the femur to the tips of your toes. Axial is everything else.
Cranium
Vertebra
How many vertebrae are in the human body?
Almost all humans are born with 33 separate vertebrae. By adulthood, most have only 24. This is due to the fusion of the vertebrae in certain parts of the spine during normal development. Different textbooks give different answers to this question. The confusion comes from the fact that the two lowest vertebrae -- the sacrum and the coccyx -- are each one bone, but they are made up from smaller bones fused together.
There are 24 separate vertebrae; then there is the sacrum, which is formed from 5 fused vertebrae; and finally the coccyx, which is formed from between 3-5 fused vertebrae. Therefore, if the coccyx and sacrum are each classed as one vertebra, then there are 26 vertebrae. If the fused vertebrae are all counted separately, then there are 32-34 vertebrae. 32
The human spine has 7 cervical, 12 Thoracic and 5 Lumbar vertebrae as well as 5 (fused) in the sacrum and another 4 (fused) in the coccyx which totals 33.33 in total. 7 cervical, 12 thoracic, 5 lumbar 5 sacral+4 coccygeal (fused)
24, and are grouped under the names cervical (7 vertebrae), thoracic (12 vertebrae) and lumbar (5 vertebrae), according to the regions they occupy.
-Wikipedia
There's a total of 33 vertebrae - comprising... 7 cervical, 12 thoracic, 5 lumbar, 5 sacral and 4 coccyx (fused)
The correct answer is 33
But usually there are "fused" bones (probably a bad thing) during our human development.
I should point out that this number 33 has significance in many other areas besides just the actual number of our human vertebrae.
thirty
-three (33)
vertebraein
humans
There are 7 cervical vertebrae, 12 thoracic vertebrae, 5 lumbar vertebrae, 5 sacral vertebrae and 4 coccygeal vertebrae. That's a total of 33 vertebrae.
33
33
26 vertebrae make up the spine. Oddly enough, we have the same amount of vertebrae as giraffes do!
in the human spine there is 7 cervical, 12 thoracic, and 5 lumbar vertebae.
The spine consist of 24 moving segments plus the sacrum and the coccyx.
33. :)
Vertebral Column
- Cervical Vertebrae - 7
- Thoracic Vertebrae - 12
- Lumbar Vertebrae - 5
- Sacrum -1
- Coccyx - 1
Total Vertebral Column = 26
In the human vertebral column, there exist the following vertebrae:
7 Cervical Vertebrae
12 Thoracic Vertebrae
5 Lumbar Vertebrae
Although these are the vertebrae commonly recognized as the spine, there is also the sacrum (In layman's terms: the arrowhead shaped bone structure at the bottom of the spine, before the tailbone). The sacrum is actually made up of vertebrae which are fused together to make a more whole bone structure.
5 vertebrae make up the sacrum
Also, the coccyx (tailbone) is considered another vertebrae
1 vertebrae in the coccyx
Which is the largest bone in the human body?
in mass is is the skull but in length it is the spine
-The skull is actually composed of 22 individual bones that are fused; the spine of 24 individual vertebrae. The femur (thigh bone) is the heaviest and longest individual bone in the human body.
What are all the human bones names and labeled?
nose = nasal
hips = pelvis tibia = shin ankle = tarsal thigh = femur skull = cranium
lower jaw = mandible upper jaw = maxilla breastbone = sternum
fingers = phalanges or metacarpals toes = phalanges or metatarsals
lower arm = ulna and radius funny bone = humerus kneecap = patella
spine = vertebra shoulder blade = scapula
collarbone = clavicle
lower spine = lumber vertebra heel bone = calcanues
Do men have more ribs than women?
No. This is an old "wives tale". Males have the same number as females: 12 pairs.
Some times you have additional pair of rib, that is attached to last cervical vertebra. Then it is called as cervical rib. Cervical rib can be found in both the sexes.
How many bones are there in the human hand?
There are 27 bones in a human hand.
There are
14 phalanges; proximal, medial (all except the thumb), and distal in the fingers.
5 metacarpals, I, II, III, IV, & V in the hand.
8 carpals: scaphoid, lunate, triquetrum, pisiform, hamate, capitate, trapezoid, and trapezium in the wrist.
One-fourth of all of your bones are in your hands. And half of all your bones are in your hands and feet, since the feet have another 52 bones.
How many bones are in the adult human body?
The adult human body has 206 bones. An infant may have from 300-350 bones at birth. Many of these fuse together as the infant grows. When some bones fuse and become one bone (most obvious examples are in the skull, sacrum and hip bones) the number of overall bones drops to the 206 bones that most adults have.
Of the 206 bones in the adult human body, more than half (106) are in the hands and feet. The adult skeleton consists of the following bones:
- 28 skull bones (8 cranial, 14 facial, and 6 ear bones)
- The horseshoe-shaped hyoid bone of the neck which is the only bone that does not articulate (connect via a joint) to another bone
- 26 vertebrae (7 cervical or neck; 12 thoracic; 5 lumbar or loins; the sacrum, which is five fused vertebrae; and the coccyx, which is four fused vertebrae)
- 24 ribs plus the sternum or breastbone; the shoulder girdle (2 clavicles, the most frequently fractured bones in the body, and 2 scapulae)
- the pelvic bones (3 fused bones called the coxal bone, or Os Coxae)
- 30 bones in each of the arms and legs (a total of 120)
- a few partial bones, ranging from 8-18 in number, which are related to joints
There are individual variations: for example, some people are born with an extra rib or lumbar vertebra and not everyone has Inca (sutural) bones.
What two features set the human skeleton apart from other skeletons?
Two unique features of the human skeleton are the upright posture that allows humans to walk on two legs (bipedalism) and the opposable thumb that enables a precise grip and manipulation of objects. These features are not commonly found in other skeletons of animals.
