Fill in the Blanks Sweat glandsOnline version Complete this text about the sweat glands. by Lucía Fernández Carrasco CEIP Revello Málaga 1 skin cool body pore blood water outside cells filter temperature waste When we do sports or when we get hot , we sweat . Sweat is a mixture of and substances , and it is produced in the sweat glands in your . Each sweat gland is formed by a large tube . The lower end of the tube acts as a , and at the top of the tube there is a that opens up to the . The functions of the sweat glands are : - To filter . They collect waste substances and water from the and expel them from the as sweat . - To control body . When it is hot , we sweat . This causes our body to down .