Download Croft`s Way to Make a 100/A

Croft’s Way to Make a 100/A
Chapter 17
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The tough outer covering of bones is called periosteum.
Tissue in the center of bones that makes blood cells is called marrow.
Any place where 2 or more bones meet is called a joint.
Tough bands of tissue that hold bones together are called ligaments.
Any organ that contracts and gets shorter is a muscle.
Thick bands of tissue that attach muscle to bones are tendons.
Muscles that we cannot control are called involuntary muscles.
Involuntary muscles of the digestive system are examples of smooth muscles.
The inside layer of skin is called the dermis.
The outside layer of the skin is called the epidermis.
The human skeleton has 206 bones in its body.
Proteins make bone hard.
The hard, strong layer of bone is called compact bone.
One function of spongy bone is to make the bone light.
The smooth, flexible layer of tissue covering the ends of bone is cartilage.
The joints of the bones of the wrist and backbone are classified as gliding joints.
There are more gliding joints in your body than any other joint.
The outer ear and the nose are made up of cartilage.
About 35-40% of your body’s weight is muscle.
Most muscles in the body are skeletal muscles.
Cardiac muscles are found in the heart, have striations, and are involuntary.
Melanin is the chemical that gives skin its color.
Vitamin D helps the body absorb calcium.
There are about 3 million sweat glands in the skin.
The neck is a pivot joint.
The shoulder and hip are ball and socket joint.
The wrist and ankle are gliding joint.
The elbow, knee, and finger are all hinge joints.
Bones store large amounts of calcium and phosphorous for later use by the body.
The cavities in the center of large bones are filled with a fatty tissue called marrow.
The joints that connect the bones of the skull are immovable joints.
In a ball and socket joint, 1 bone rotates in a ring around another stationary bone.
Of the 3 types of muscle found in the body, only skeletal muscles are voluntary.
Muscles use energy in the form of glucose.
Skin is the largest organ of the body.
The skin makes vitamin D when in the presence of sunlight.
The thigh is a skeletal muscle.
The upper arm is a skeletal muscle.
The large intestine is a smooth muscle.
The heart is a cardiac muscle.
The hand is skeletal muscle.
The liver is a smooth muscle.
The neck is skeletal muscle.
There are more than 600 muscles in the human body.
How does sweating help a runner? Keeps body temp. cool
What occurs when the epidermis is slightly injured? Scab forms
The harder you make your muscles work, the stronger they get.