Which system produces and releases hormones through glands

The act of chewing to break up food into smaller pieces is a type of what digestion

The combining of a sperm cell and an egg cell creates a

Which system transports oxygen, red blood cells and hormones throughout the body

It is the primary sex hormone in males that gives rise to secondary male characteristics such as deeper voice, facial hair, and muscle development.

Which system is responsible for sending and receiving messages?

What are the cells that are responsible for sending messages to the brain and spinal cord?

Which organ do most nutrients get absorbed into?

What system removes waste from the body and includes the skin, lungs, kidneys and large intestine?

All systems working together to maintain a stable environment is called

Movement of the body would mostly involve which two body systems?

The egg and sperm uniting is called

Which organ produces insulin to regulate the body's sugar levels?