Skeletal --->Skeletal The skeletal system is very important for our bodies. It........ - protects vital organs - allows for movement - gives your body support - gives your body shape - and, it does blood production in the red bone marrow.
But how does it provide all these functions for us? Well, with structures, of course! You probably know that the skeletal system is made of bones. But it goes deeper than that........
Part
Structure/Location
Function
Periosteum (outer covering on bone)
thin, tough membrane that covers the surface of the bone, contains nerves and blood vessels
protects bone, is a place for the attachment of tendons and muscles, contains cells that produce bone tissue
Compact Bone
hard, dense bone tissue under periosteum, very few spaces, contains minerals and calcium and phosphorus
protects the bone marrow, provides structure, support and shape
Spongy Bone
located at ends of long bones and ribs and flat bones, many hollow spaces
spaces are filled with red bone marrow in living bones
Bone Marrow:
Red Marrow
Yellow Marrow
soft, buttery tissue inside of long bones
place for blood production
red: produces red and white blood cells and platelets
yellow: contains fat and connective tissue and produces some white blood cells
Also, there are literal connections between bones- at joints! Here are the different parts on joints........
Cartilage- a smooth and shiny tissue. It protects bones and lets them glide easily by each other as they move. Ligaments- strong fibrous bands that connect the bones that make up a joint. They hold they joint together while still allowing for some movement. Fluid- a thick, slippery nutrient-rich fluid that lubricates joints.
Skeletons come in other forms besides the human one, you know. But there are advantages and disadvantages to all of them........
Type of Skeleton
Advantage
Disadvantage
Example of an animal with that skeleton
Exoskeleton
tough (for protection), water-resistant, protects from drying out
hard to grow, when molting an animal is left unprotected
lobster, crab, ant, grasshopper
Endoskeleton
can grow with the organism, bones are adapted for different jobs
bones can BREAK
human, dog, cat, snake, and all other vertebrates
Hydrostatic Skeleton
easy to fit into small places, can't break bones, well adapted to life in the water
can't grow big, easily squashed, not much protection
The skeletal system is very important for our bodies. It........
- protects vital organs
- allows for movement
- gives your body support
- gives your body shape
- and, it does blood production in the red bone marrow.
But how does it provide all these functions for us? Well, with structures, of course! You probably know that the skeletal system is made of bones. But it goes deeper than that........
Red Marrow
Yellow Marrow
red: produces red and white blood cells and platelets
yellow: contains fat and connective tissue and produces some white blood cells
Cartilage- a smooth and shiny tissue. It protects bones and lets them glide easily by each other as they move.
Ligaments- strong fibrous bands that connect the bones that make up a joint. They hold they joint together while still allowing for some movement.
Fluid- a thick, slippery nutrient-rich fluid that lubricates joints.
Skeletons come in other forms besides the human one, you know. But there are advantages and disadvantages to all of them........