Apologia Anatomy & Physiology Lesson 2: Skeletal System

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Apologia Exploring Creation with Human Anatomy & Physiology

Calcium

A mineral stored in your bones that helps keep your heart beating and your brain thinking. It also makes your bones strong.

Can you name at least five other bones in your body by their scientific names?

...

Can you name at least one kind of joint?

Hinge joint
Ball and socket joint
Saddle joint
Sliding joint
Pivot joint
Ellipsoidal joint

Cartilage

A firm but resilient material in the body and on the ends of bones that absorbs shock well and keeps the bones from getting hurt when they rub against one another.

Collagen

The tough fiber that makes up part of the bone.

Compact Bone

Thick, hard layer of bone under the periosteum.

Cranium

The bones of your skull that protect your brain.

Femur

The longest bone in the body-the thigh bone.

Ligaments

The tissues that connect one bone to another bone.

Name the different things that bones do for your body.

They give you form and hold you up, they protect organs, they make blood cells, they store minerals and fats, and they help you move.

Osteoblasts

The cells that make new bones.

Osteoclasts

The bone cells that eat away at the spongy layer, causing your bones to get wider.

Periosteum

The outside layer of a bone: a thin, tough membrane.

Phalanges

Bones of the fingers and toes

Red Bone Marrow

This is the kind of bone marrow in which blood cells are made.

Rib Cage

The bones that protect your heart and lungs.

Sesamoid Bones

Small, round bones that are often found in the hands and feet; the largest is the patella.

Skeletal System

The bony supportive structure within the human body.

Skull

The group of bones that make up your head.

Spinal Column

The row of bones called vertebrae in the middle of the back that contains and protects the spinal cord.

Spongy bone

The layer of bone under the compact bone. It is a network of pores and tunnells interconnected in a pattern that makes the bone strong yet resilient.

Sutures

Joints that do not move.

Synovial Fluid

Fluid that allows the joints to move more easily.

Vertebrae

Bones of the spinal column

What are osteoblasts?

The cells that make new bone

What are the two kinds of bone marrow?

Red bone marrow and yellow bone marrow

What do ligaments do?

They hold the bones together

What is the bone tissue that forms tunnels and pores called?

Spongy bone

What is the periosteum?

The outer layer on a bone that has nerves and blood vessels.

What is the rounded part of your skull called?

The cranium

What mineral makes compact bone strong and hard?

Calcium

Where are the smallest bones in your body found?

In the ear

Which is the longest bone in your body?

The femur

Yellow Bone Marrow

This is the kind of bone marrow that consists primarily of cells which store fat.

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