STRUCTURES AND FUNCTIONS IN LIVING ORGANISMS

Question 1

what are cells

Answer 1

cells are specialised to carry out a particular functions so their structures can vary.

e.g. red blood cells are specialised for carrying oxygen and white blood cells are specialised for defending the body again disease

Question 2

what is a tissue

Answer 2

a tissue is a group of similar cells that work together to carry out a particular function (for example, xylem tissue for transporting water and mineral salts) or (phloem tissue for transporting sucrose and amino acids) a tissue can be made up of than one cell type.

Question 3

what is an organ

Answer 3

and organ is a group of different tissues that work together for perform a function.

An example of these are lungs in mammals and leaves in plants - these are both made up of several different tissue types

Question 4

what are organ systems

Answer 4

organs work together to form organ systems. each system does a different job

for example, in mammals, the digestive system is made up of organs including the stomach, intestines, pancreas and liver