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2006-08-01 20:26:01 · 20 answers · asked by ~ Tan ~ moon7x4 ~ 1 in Science & Mathematics Biology

20 answers

Here is the breakdown:

The adult skeleton consists of 206 bones . . .

- 28 skull bones (8 cranial, 14 facial, and 6 ear bones);

- the horseshoe-shaped hyoid bone of the neck;

- 26 vertebrae (7 cervical or neck, 12 thorax, 5 lumbar or loins, the sacrum which is five fused vertebrae, and the coccyx, our vestigial tail, which is four fused vertebrae);

- 24 ribs plus the sternum or breastbone; the shoulder girdle (2 clavicles, the most frequently fractured bone in the body, and 2 scapulae);

- the pelvic girdle (2 fused bones);

- 30 bones in our arms and legs (a total of 120);

- There are also a few partial bones, ranging from 8-18 in number, which are related to joints.

2006-08-01 20:32:11 · answer #1 · answered by rcsanandreas 5 · 4 0

A typical adult human skeleton consists of 206, 208 or more bones depending on the counting method. The count of 208 considers the sternum to be made up of three bones instead of one; manubrium, body of sternum (gladiolus) and xiphoid process. Anatomical variation may also result in the formation of more or less bones.More common variations include cervical ribs or an additional lumbar vertebra. Babies are born with around 300 to 350 bones, many of which fuse together.

2016-03-16 12:29:24 · answer #2 · answered by Gail 4 · 0 0

I concur with Cyx, I too am a radiologic technologist and nuclear medicine tech, and there are 206 bones in the body. Perhaps if one were counting all the little sesamoid bones in the joints you could get some of these other numbers I've seen in here. Males and females have the same number of bones, they are just shaped slightly different due to their different needs, such as child bearing or larger muscle capacity.

2006-08-01 21:38:10 · answer #3 · answered by nukecat25 3 · 0 0

Human infants have 236 bones becoz many of the bones are not fused in human infants.

an adult human have 206 bones in body.
including verbral coloumn, ribs, skull, leg and hand bones, synsacrum, coccyx, pelvic and pectoral girdle.
This number also includes ear bone and nasal bone.

2006-08-01 21:35:43 · answer #4 · answered by Anonymous · 0 0

The human skeleton is made of individual or joined bones (such as the skull), supported and supplemented by a structure of ligaments, tendons, muscles, cartilage and other organs.

The skeleton is not unchanging; it changes composition over a lifespan. Early in gestation, a fetus has no hard skeleton — bones form gradually during nine months in the womb. At birth, all bones will have formed, but a newborn baby has more bones than an adult. On average, an adult human has 206 bones (according to Gray's Anatomy, but the number can vary slightly from individual to individual), but a baby is born with approximately 270 bones which fuse together to reach the number of 206 bones of the adult body. The difference comes from a number of small bones that fuse together during growth, such as the sacrum and coccyx of the vertebral column. An infant is born with pockets of cartilage between particular bones to allow further growth. The sacrum (the bone at the base of the spine) consists of five bones which are separated at birth but fuse together into a solid structure in later years. Growing is usually completed between ages 12 and 14, at which point the bones have no pockets of cartilage left to allow more growth.

Not all bones are interconnected directly. There are 6 bones, auditory ossicles, (three on each side) in the middle ear that articulate only with each other. Another bone, the hyoid bone in the neck, does not touch any other bones in the body, and is supported by muscles and ligaments, it serves as the point of attachment to the tongue.

The longest and heaviest bone in the body is the femur and the smallest is the stapes bone in the middle ear. In an adult, the skeleton comprises 20% of the total body weight.

Functions
The most obvious function of bone is to: support the body. It also the site of haematopoiesis, the manufacture of blood cells, that takes place in bone marrow (which is why bone marrow cancer is very often a terminal disease). It is also necessary for protection of vital organs. Movement in vertebrates is dependent on the skeletal muscles, which are attached to the skeleton by tendons. Without the skeleton to give leverage, movement would be greatly restricted. Bone also serves as a mineral storage deposit in which nutrients can be stored and retrieved.

Organization
One way to group the bones of the human skeleton is to divide them into the axial skeleton and the appendicular skeleton. The axial skeleton consists of bones in the midline and includes all the bones of the head and neck, the vertebrae, ribs and sternum. The appendicular skeleton consists of the clavicles, scapulae, the arm bones, the bones of the pelvis and the leg bones.

A more systematic division of the bones of the human skeleton divides them into the:
skull
middle ear
shoulder girdle
ribcage
vertebra
arms
hands
pelvis
legs
feet

Gender differences
A prepared human skeleton, as used in biology educationThere are many differences between the male and female human skeletons. Men tend to have slightly thicker and longer limbs and digit bones, while women tend to have narrower rib cages, smaller teeth, less angular mandibles, and less pronounced cranial features such as the brow ridges and occipital protuberance (the small bump at the back of the skull). Most striking is the difference in hip bones, owing to differences related to the process of reproduction, and very likely also to the biological process of sexual selection. There are a number of smaller differences between human male and female skeletons as well.

The book Genesis of the Bible tells that Eve was created from one of Adam's ribs. This has lead some people to assume that men have one less rib than women, but upon inspection this is false: men and women both have 12 pairs of ribs. In addition, removed ribs usually regenerate within 2-3 months of sectional surgery, as in the surgical procedure rib thoracoplasty.

2006-08-01 23:59:53 · answer #5 · answered by cookie 2 · 0 0

206. Unless you have broken one and had it replaced...then you subtract. to be more exact...32 in each arm, 31 in each leg, 29 in the skull, 26 in the spine, and 25 in the chest. A few people have another pair of ribs makig 13 pairs. Many have an extra bone in their hands or feet.

2006-08-01 20:31:46 · answer #6 · answered by cyx 2 · 0 0

I don't know the proper answer to this but I know a man who was involved in a terrible road accident and broke 72 bones.

Is this a record?

He is still alive but in a wheelchair

2006-08-01 20:31:04 · answer #7 · answered by andyoptic 4 · 0 0

206 bones within 2 systems. The first is the axial system which is the trunk of our body and the other is the appendicular system which is our limbs.

2006-08-01 20:32:18 · answer #8 · answered by just curious 1 · 0 0

206

2006-08-01 23:32:58 · answer #9 · answered by Anonymous · 0 0

206 bones in adult human and upto 300 bones in a child,they fuse afterwards

2006-08-01 21:23:28 · answer #10 · answered by sagar 2 · 0 0

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