1
The system of the body that brings oxygen into the body and releases carbon dioxide
2
The large artery that brings blood from the heart to the lungs
3
A waste product made by cells of the body; humans rid themselves of this waste by exhaling
4
Tubes in the body through which blood flows
5
Small blood vessel that transports nutrients and gases between the blood and tissues in an animal
6
A chamber in an animal's heart that pumps blood out to the body
7
A carbohydrate; produced by photosynthesis
8
Blood vessel that carries blood away from the heart
9
An element that makes up about 21% of Earth's atmosphere; a gas in Earth's atmosphere and in water that living organisms breathe
10
Tissue that brings oxygen and nutrients to the cells of the body and removes wastes from the cells of the body
11
The major artery responsible for transporting blood from the heart to other parts of the human body
12
An object that can permit or block the flow of material through some region
13
Blood vessels that carry blood toward the heart
