How is the skeletal system involved in the production of blood? What kind of skeletal system do organisms in the phylum mollusca exhibit?
What are the various components of periosteum? See all questions in Skeletal System. Impact of this question views around the world. You can reuse this answer Creative Commons License. The stapes, a bone in your inner ear, is the smallest of all your bones. This bone is also sometimes called the stirrup because of its Y shape. Together with the anvil and hammer bones, the stapes helps translate sounds you hear into waves your brain can understand. The femur, which runs from your hip to your knee, is the longest and largest bone in your body.
Just think of all the weight that bone handles in a day. Yes, bones can break. For example, some bones must be able to absorb two to three times your body weight in force. They must also be resilient. You take 1 to 3 million steps per year, so bones are built to take the constant use.
You have bones in total, and of them are in your hands and feet. The hyoid is responsible for holding your tongue in place. A 13th rib is rare — only 1 percent of people are born with it. In most people, this extra rib, called a cervical rib, can cause medical issues like neck pain. For that reason, people born with this extra rib often have it removed. At the knee joint, three bones connect: your femur, tibia, and patella.
Those three large bones require an equally large joint to connect them. Humans are part of a group of creatures called vertebrates. That means our bones are covered by a system of tissue and skin. The other 90 percent are invertebrates. Their bones are on the outside of their body. The enamel on your teeth, which are considered part of your skeletal system, is actually stronger than bones.
Enamel protects the delicate nerves and tissue inside your teeth. Inch for inch, your teeth can take more wear and tear than any of your other bones.
When you fracture a bone, your body will go to work producing new bone cells and helping heal the break. Bones lose strength over time. Keeping them strong requires eating calcium-rich foods like dairy products, broccoli, and some fish.
Bones are further classified by their shape: long, short, flat, irregular or sesamoid, according to SEER. There are some variations between male and female skeletons. For example, the female pelvis is typically more broad, thin, and round than the male pelvis, according to the National Museum of Natural History.
Three main types of material make up every bone in your body: compact bone, spongy bone and bone marrow, according to the School of Life Sciences at Arizona State University. Compact bone makes up the outer layers of the bone and protects the inner parts of the bones where many vital functions occur, such as bone marrow production.
Compact bone consists primarily of cells called osteocytes. Microscopic passages in between the cells to allow nerves and blood vessels to pass through. Most often found toward the ends of individual bones, the spongy bone material is filled with bone marrow, nerves and blood vessels.
Two types of bone marrow fill the pores in spongy bone. Approximately half is red bone marrow, which is found mainly within flat bones such as shoulder blades and ribs. This is where all red and white blood cells and platelets cells that help a cut stop bleeding are made. Infant's bones contain all red bone marrow to produce enough blood cells to keep up with the youngsters' growth.
The other half of marrow is yellow bone marrow, which is found in long bones, such as thigh bones, and consists primarily of fat. Blood vessels run through both types of bone marrow to deliver nutrients and remove waste from the bones.
0コメント