Answer: The respiratory system, the circulatory system, and the muscular system
Hope this helps :)
Answer:
D) Mammals are more closely related to birds because they share a more recent common ancestor.
Explanation:
- Mamals, birds, amphibians, reptiles and fishes are vertebrates.
- Vertebrates have the spinal cord surrounded by cartilage or bone.
- Mammals are more closely related to birds because they both are evolved from reptiles.
- Reptiles are tetrapod vertebrates.
I would say the 2nd one It helps growth and repair of cells of orgasms
But your school would probably say the 3rd one It helps remove toxins from the body to maintain homeostasis