The Human Body

Question 1

Red blood cells

Answer 1

Haemoglobin to carry oxygen
No nucleus
Disc-shaped
Made in the bone-marrow
5million per mm3 of blood

Question 2

White blood cells

Answer 2

Fight infection
Produce antibodies
Nucleus present
No definite shape
8,000 per mm3 of blood

Question 3

Platelets

Answer 3

Blood clotting
No nucleus
Fragments of cells
1/4 million per mm3 of blood

Question 4

Plasma

Answer 4

90% water
Carries platelets and red and white blood cells
Carries dissolved (10%)e.g. glucose,proteins,urea

Question 5

Functions of blood

Answer 5

Transport,heat,hormones,blood,cells,oxygen,carbon dioxide,glucose (food),waste (urea)
Defense against disease
White blood cells(w.b.c) and platelets
Clotting platelets

Question 6

Haemoglobin

Answer 6

Red pigment that contains iron. Located in red blood cells carries oxygen

Question 7

Aorta

Answer 7

Oxygenated blood the leaves heart to go to the rest of the body

Question 8

Septum

Answer 8

The heart is a double pump,separated into left and right side by the septum

Question 9

Venae cavae

Answer 9

Deoxygenated blood enters the right atrium of the heart through the venae cavae

Question 10

Atria

Answer 10

the upper chambers of the heart, where blood first enters the heart.

Question 11

Ventricles

Answer 11

the lower chambers of the heart where blood goes when it leaves the atria

Question 12

Pulmonary artery

Answer 12

brings deoxygenated blood from the body to the heart.

Question 13

Valves

Answer 13

Gateways that open and close to let blood flow through the heart, and stop backflow in the veins

Question 14

Pulse

Answer 14

A wave of vibrations that passes through an artery in response to blood being forced out of the left ventricle.

Question 15

Deoxygenated blood

Answer 15

Blood that comes from other parts of the body that has less oxygen, and more carbon dioxide. It must go to the lungs to get more oxygen.

Question 16

Oxygenated blood

Answer 16

Blood rich in oxygen that comes from the lungs.

Question 17

Healthy heart

Answer 17

A balanced diet, exercise and rest are very important for a healthy heart.

Question 18

Capillaries

Answer 18

Connect arteries and veins

Question 19

Veins

Answer 19

Carry blood back to the heart

Question 20

Ingestion

Answer 20

The food is taken into the mouth

Question 21

Digestion

Answer 21

the food is broken down into simpler, absorbable molecules

Question 22

Absorption

Answer 22

the absorbable molecules are passed into the blood and carried to all of the cells of the body

Question 23

Assimilation

Answer 23

the food is used by the body

Question 24

Egestion

Answer 24

undigested food material is released from the digestive system as faeces

Question 25

Villi

Answer 25

small fingerlike projections that cover the small intestines. They provide an increased surface area to allow food to be absorbed into the bloodstream.

Question 26

Enzymes

Answer 26

Are chemicals that speed up reactions without being used up in the reaction

Question 27

Mouth

Answer 27

Physical and chemical digestion

Question 28

Oesophagas

Answer 28

Brings food from mouth to stomach

Question 29

Liver

Answer 29

Makes bile

Question 30

Stomach

Answer 30

digestionPhysical and chemical

Question 31

Pancreas

Answer 31

Makes digestive juices

Question 32

Small intestine

Answer 32

Most chemical digestion

Question 33

Large intestine

Answer 33

Water reabsorption

Question 34

Rectum

Answer 34

Stores undigested food

Question 35

Anus

Answer 35

Undigested food passes out

Question 36

Salivary gland

Answer 36

Secrete salvia onto the food in the mouth to help soften food

Question 37

Th human dental formula

Answer 37

2 1 2 3 2 1 2 3 for half of upper and lower jaw

Question 38

Hydrochloric acid

Answer 38

In the stomach chemically digests food and kills bacteria