body systems

Question 1

molecules

Answer 1

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

Question 2

organelles

Answer 2

small structure in a cell with a special function

Question 3

cells:

Answer 3

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.

Question 4

tissues:

Answer 4

groups of cells performing the same function

Question 5

systems

Answer 5

group of organs working together

Question 6

cellular respiration:

Answer 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.

Question 7

digestive system:

Answer 7

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

Question 8

excretory system

Answer 8

: the body system that removes waste substances from the body

Question 9

musculoskeletal system:

Answer 9

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.

Question 10

reproductive systems:

Answer 10

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

Question 11

nervous system

Answer 11

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

Question 12

endocrine system

Answer 12

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

Question 13

skeletal system

Answer 13

consists of the bones and joints

Question 14

skeletal muscle system

Answer 14

voluntary or striated muscle

Question 15

skeleton:

Answer 15

the bones or shell of an animal that support and protect it as well as allowing movement

Question 16

bones

Answer 16

the pieces of hard tissue that make up the skeleton of a vertebrate

Question 17

bone marrow

Answer 17

a substance inside bones in which blood cells are made

Question 18

cartilage

Answer 18

a waxy, whitish, flexible substance that lines or connects bone joints or, in some animals such as sharks, replaces bone as the supporting skeletal tissue. The ears and tips of noses of people are shaped by cartilage.

Question 19

calcium

Answer 19

an element occurring in limestone, chalk, also present in vertebrates and other animals as a component of bone, shell etc. It is necessary for nerve conduction, heartbeat, muscle contraction and many other physiological functions.