Excretory System/ Plant tissues

Question 1

What is the role of the excretory system?

Answer 1

Responsible for the elimination of metabolic wastes (cell waste not food).

Question 2

What organs are involved in the process of excretion?

Answer 2

• Skin
• Lungs
• Liver
• Kidney

Question 3

What is the role the kidney?

Answer 3

Regulate water balance in the body. Blood enters nephrons in the kidneys and their impurities are filtered out. The blood is then re-absorbed into the capillaries. The by-product urine filters into the bowels then leaves through the urethra.

Question 4

What is the role of the skin?

Answer 4

Excretes sweat containing water and sodium to cool the body down.

Question 5

What is the role of the lungs?

Answer 5

Lungs have gas exchange and remove and excrete CO2 from the blood.

Question 6

What is the role of the liver?

Answer 6

Main detoxifying organ of the body , especially for nitrogenous wastes. The cells play host to biochemical processes that creat ammonia form amino acids. Since ammonia is extremely toxic, it is quickly converted to urea before being transported in the blood towards the kidney.

Question 7

What are the xylem and phloem in plants?

Answer 7

Plant tissues that transport water tridents and minerals and are made up of rows of cells.

Question 8

What is the main function of the xylem?

Answer 8

To transport water upwards.

Question 9

What is the main function of the phloem?

Answer 9

Transports soluble organic compounds made during photosynthesis in particular , the sugar glucose to parts of the plant where needed. Goes downwards.