1
By evaporating, sweat helps us to regulate our ......
2
Which blood vessels permit the exchange of substances
3
The sensory organs have special cells called _______ cells
4
Which blood vessels transport blood from our hearts to our organs
5
______ glands produce sweat
6
Our skin is or organ of ....
7
Which blood vessels return the blood to the heart
8
Sweat glands have an opening to the outside of our body through a ......
