Topic 4- Body systems Flashcards Preview

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Flashcards in Topic 4- Body systems Deck (20):
1

Molecule

two or more atoms joined (bonded) together, forming a small particle

2

Organelles

small structure in a cell with a special function

3

Cells

the smallest unit of life. Cells are the building blocks of living things. There are many different sized and shaped cells in animals and plants, as well as single-celled organisms.

4

Tissues

groups of cells performing the same function

5

Systems

group of organs working together

6

Cellular respiration

the chemical reaction involving oxygen that moves the energy in glucose into the compound ATP. The body is able to use the energy contained in ATP.

7

Respiratory system

the body system involving the lungs and associated structures, which take in air and supply the blood with oxygen to deliver to the body’s cells so they can carry out their essential functions; it also performs gas exchange to remove the waste gas carbon dioxide

8

Digestive system

a complex series of organs and glands that processes food to supply the body with the nutrients it needs to function effectively

9

Excretory system

the body system that removes waste substances from the body

10

Circulatory system

the body system that circulates oxygen in blood to all the cells of the body. The circulatory system consists of the heart, the blood vessels and blood.

11

Blood Cells

the red liquid that circulates around the body. It is made up of plasma, blood cells and platelets.

12

Blood Vessels

the veins, arteries and capillaries through which the blood flows around the body

13

Heart

a muscular organ that pumps blood through the circulatory system so that oxygen and nutrients can be transported to the body’s cells and wastes can be transported a

14

Arteries

hollow tubes (vessels) with thick walls carrying blood pumped from the heart to other body parts

15

Capillaries

minute tubes carrying blood to body cells. Every cell of the body is supplied with blood through capillaries.

16

Veins

blood vessels that carry blood back to the heart. They have valves and thinner walls than arteries.

17


Musculoskeletal system

consists of the skeletal system (bones and joints) and the skeletal muscle system (voluntary or striated muscle). Working together, these two systems protect the internal organs, maintain posture, produce blood cells, store minerals and enable the body to move.

18

Reproductive system

the body system involving the reproductive organs, which differ between males and females

19

Nervous system

the system of nerves and nerve centres in an animal in which messages are sent

20

Endocrine system

the body system of glands that produce and secrete hormones into the bloodstream to regulate processes in various organs