Cells

Question 1

Identify and define the 4 main units of the human body

Answer 1

Cells: is the basic, microscopic unit of life that makes up all the tissues and organs in the human body

Tissues: group of cells which perform the same kind of function

Organs: groups of tissues that work together to perform special functions eg. kidney, heart, skin, liver…

Organ Systems: groups of organs that work together to perform certain functions eg. urinary system

Question 2

Identify and define the
- nucleus
- cytoplasm
- cell membrane

Answer 2

Nucleus: (“control center”)

Cytoplasm: fluid inside cell

Cell Membrane: substances can pass in and out of

Question 3

What is the defining characteristics of the cell that separates human cells from plant cells?

Answer 3

It is the presence of a rigid Cell Wall & Chloroplasts in plant cells, which are absent in human cells

Question 4

Define and name the different Body Cavities found in a human?

Answer 4

Body Cavities: organs that are located within body cavities

Ventral: anterior (front) aspect of the body including the chest and down to the abdomen
Dorsal: posterior (back) of the body including the brain and the spine

Question 5

What is a Homeostasis?

Answer 5

A state of balance among all the body systems needed for the body to survive and function properly