Page 17 - SAAT BIOLOGY PART 2

SAAT BIOLOGY MR.MOHAMED ELGAYAR MRPROF.NET
Stimulants: drugs that increase alertness and physical

activity, such as caffeine that is found in tea, coffee, and

soda

Depressants: drugs that tent to slow down the central

nervous system, such as alcohol

Addiction: the psychological and physiological

dependence on a drug

▪ Circulatory System

Consist of blood, heart, blood vessels (arteries, capillaries,

and veins), and lymphatic system.

• The heart: four-chambered two atriums and two

ventricles

• Right atrium: accepts blood from the body

• Left atrium: accepts blood from the lungs

• Right ventricle: pumps deoxygenated blood to the lungs

through the pulmonary arteries

MRPROF.NET MR.MOHAMED ELGAYAR MRPROF.NET@GMAIL.COM