1.
Tiny air sacs in the lungs where oxygen is absorbed.
2.
The body's largest artery, carrying blood from the heart.
3.
Blood vessels that carry blood away from the heart.
4.
A muscular sac that stores urine.
5.
The red fluid pumped throughout the body.
6.
Hard tissues that form the skeleton and give the body structure.
7.
The main control center of the nervous system.
8.
Very tiny blood vessels that connect arteries and veins.
9.
A strong, elastic tissue found in the nose and ears.
10.
The basic building blocks of all living things.
11.
The part of the brain responsible for learning and memory.
12.
The body's delivery system for nutrients and oxygen.
13.
A muscular partition that helps with breathing.
14.
The system that breaks down food into usable particles.
15.
The system that uses hormones as chemical messengers.
16.
The tube that connects the mouth to the stomach.
17.
The system responsible for eliminating waste products.
18.
The strong muscle that pumps blood.
19.
Chemical messengers produced by the endocrine system.
20.
Long tubes in the abdomen that absorb nutrients and water.
21.
Areas where two bones come together, like knees and elbows.
22.
Organs that filter waste products from the blood.
23.
Tough tissues that connect bones to other bones.
24.
A large organ that produces bile for digestion and filters blood.
25.
Organs where blood gets oxygen.
26.
Tissues that enable movement.
27.
Fibers that carry messages throughout the body.
28.
Another word for a nerve cell.
29.
The gas we breathe in that is essential for life.
30.
An organ that produces digestive enzymes and hormones like insulin.
31.
The watery fluid part of the blood.
32.
The system involved in breathing and gas exchange.
33.
The system providing structure and support to the body.
34.
The largest organ and part of the integumentary system, a protective barrier.
35.
CORD The long bundle of nerves connecting the brain to the rest of the body.
36.
The organ where food is mixed with strong acids and enzymes.
37.
Strong fibrous tissues that connect muscles to bones.
38.
The windpipe that carries air to the lungs.
