Kicking a football -- either a round soccer ball, oval American or rugby ball -- uses a lot of muscles and joints. A successful kick requires good eye-foot coordination, balance, accuracy, skill and power.

If you find yourself hustling to the washroom soon after drinking a cup of coffee, you aren't experiencing an abnormal reaction to your choice of beverage. Although caffeinated coffee affects everyone differently, it commonly results in an urge to have a bowel movement.

According to Minnesota State University's Emuseum, one of the most important ways the skeletal system works with other systems is via protection. Of particular importance is the skeletal system's ability to protect the central nervous system, which is made up of the spinal cord and the brain.

The bladder is a hollow organ in the lower abdomen that helps store urine. Several conditions, such as incontinence, bladder infections, bladder cancer and cystitis, can affect the functioning of the organ and may lead to bladder discomfort. Your doctor may prescribe medications or surgery to treat your condition.

Physiology encompasses the tissue, organ and cellular functions of the human body. An optimally healthy body has normal physiology. Conversely, human disease represents an aberration in normal physiology--something in the body fails to function as it should.

According to the Environmental Protection Agency, most fertilizers contain about the same basic materials: nitrogen, potassium, phosphorus and sometimes other nutrients, like zinc, needed for healthy plant growth.

Your ear canals are the tube-like passageways that connect your outer ears to your ear drums. In some circumstances, you can develop a type of ear canal infection called external otitis or otitis externa.

Blocked ears can be painful and can temporarily impair hearing. The most common causes include colds, air travel, sinus infections and impacted earwax. There are exercises you can try to unblock your ears. If your ears remain blocked for more than 24 hours, you should seek medical advice.

The immune system is responsible for protecting the body against invasion by diseases and other pathogens including viruses, bacteria and parasites. The immune system is also involved in the normal healing response to trauma as a protection against infection.

The body creates scar tissue as a kind of glue to hold damaged tissues together after an injury or surgery. While immensely helpful in the recovery process, scar tissue can build excessively following an ankle injury or surgery, restricting mobility in your ankle.

Posture is an important part of preventing problems ranging from back pain to fatigue. When the back is straight, the spine is supported and stabilized, but as you slouch or practice other methods of poor posture, your spine no longer has the support it needs to stay balanced, leading to many health problems.

If you are trying to strengthen your reproductive system, then you must practice good nutrition. Eating right decreases your chance of suffering from reproductive problems, like difficulty conceiving a child.