Respiratory system of the cats body

In the lungs, gaseous exchange takes place: carbon dioxide from the blood filters into the air sacs as oxygen passes from the air to replenish the blood. The used air is then exhaled. Breathing is automatic: chest muscles contract and relax, acting like a pump on the ribs and diaphragm, driving air in and out of the lungs. The breathing rate varies in each individual and depends upon:
-age
-exercise
-emotion
-environmental temperature

The normal respiration rate of a healthy, resting, adult cat is 20-30 breaths per minute.
with the oxygen that is vital for life. During respiration, the cat draws in air through his nasal passages via his nose and mouth. This air passes through the throat (pharynx) and down the windpipe (trachea), through the bronchi and into the

Circulatory system

Every body cell needs a su nourishment, and this is achieved the blood, which delivers it a removes waste products from the body. Blood is made up of red cells and white blood corpuscles are contained in a fluid called Plasma. It contains platelets contain a blood-clotting agent in the event of cuts and wound.
Red blood cells transport oxygen while white blood corpuscles and transport impurities and be that have invaded the red cells.

Incredible journey

Blood is continually pumped around the body via the four-char heart, its journey beginning in auricle (upper chamber). Er with oxygen from the lungs, the blood from the left auricle travels it left ventricle (lower chamber), into a great artery — the aorta — its course quickly through arteries and arterioles and intc network of capillaries through, body, distributing its store of and nutrients as it goes. As it are these, the blood collects waste (bacteria, dead blood cell carbon dioxide).
Leaving the capillaries, the enters tiny veins (venules) w begins to slow down, fader waste products, before passir the great veins that transport to the lungs to dump its rubbi be replenished with oxyge nutrients. From here it enters heart to repeat its journey.

Veins (shown in red)
The circulatory system
Arteries (shown in blue)
Left auricle
Heart
Left ventricle
Right auricle
Right ventricle
Liver Lungs
The major organs
Kidneys
Heart

Why cats are usually sleepy after meals
Extra nutrient-rich blood with its nutrients is required by different parts of the body at different times. After a heavy meal, for example, the cat's abdomen draws in extra blood to aid digestion, at the expense of the supply to the brain and other parts of the body. Hence the need of the cat (and indeed other animals) to rest or sleep after eating — the brain is less active and energy is being utilized in digestion rather than in other activities.
Pulse

Blood passing through the aorta causes its walls to expand, and a pressure wave (pulse) passes down the arteries. In a healthy adult cat at rest, the pulse rate is 160-240 beats per minute, depending on environmental temperature and the cat's emotional state at the time.

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