Question

question 3
what human organ system filters wastes from the blood and keeps electrolytes in balance?
a reproductive system
b endocrine system
c digestive system
d urinary system
e integumentary
question 4
a group of different types of cells working together to perform a common function is a(n) __.
a cell,
b tissue,
c organ,
d organ system.
e all of these.

Explanation:

For Question 3: The urinary system (kidneys, ureters, bladder, urethra) filters waste from blood and regulates electrolyte balance.
For Question 4: Tissues are groups of different cell types working together for a common function.

Answer:

Question 3: D. urinary system
Question 4: B. tissue.