Fishes take in water through their mouths and force it past the gills where the dissolved oxygen is taken up by blood.

Blood has many different functions, like transporting oxygen, regulating body temperature, and nutrients to the lungs and tissues and forming blood clots to prevent excess blood loss and carrying cells and antibodies that fight infection.

In normal, individual should maintain a systolic or diastolic pressure of 120/80 mm of Hg. Blood pressure is denoted by two values. One value is above and the other values is below. The total value that is above is the ...

The given reaction is a Redox reaction because oxidation and reduction both take place simultaneously. Also, it is a displacement reaction because hydrogen of NH₃ has been displaced by oxygen.

(1) Trachea or windpipe has rings of cartilage (it splits into the left and right lungs). (2) The epiglottis covers the larynx (the food does not enter the windpipe while eating).