The skeleton has a lot to tell: from our feeding to the kind of wounds we have reported during our life.
Skeletal muscles cover most of the body and are largely responsible for our physical fitness, movement and posture. They provide protection to internal organs and play an important role in maintaining body temperature at around 37Âº C.
The main function of the peripheral nervous system (SNP, the nerves of the body) is to connect the central nervous system (SNC, brain and spinal cord) to the limbs and organs by sending sensor and motor nerves information.
Self-peripheral nerves control involuntary or semi-involuntary functions, including heart rate, blood pressure, and breathing.
The blood vessels are assembled in a closed tubular circuit through which they circulate between 5 and 6 liters of blood. The heart, a powerful muscle, represents the engine of this vast network of 145,000 km of arteries, veins and capillaries to continuously carry nutrients and oxygen throughout the body.
Breathing is the way we bring vital oxygen to our body. Oxygen allows cells to use the energy stored there to keep them alive. Now, inspire and exhale. You have just taken control of breathing. Think about how hard it would be to remember to do it 12 times per minute for the rest of your life. Fortunately, breathing is usually an automatic process.
When food passes through the digestive tract, it slides into usable nutrients that are absorbed by the bloodstream and transported to each cell of the body. Within these, the energy stored in the nutrients is used as a fuel to run the body's organs.
During our lifetime we eat over 27 tons of food, the weight of six elephants.
REPRODUCTIVE APPARATUS - FETAL DEVELOPMENT
The organs of female reproduction (ovaries, fallopian tubes, uterus and vagina) are well protected within the pelvic cavity. Instead, the male organs (penis, testis) lie outside the body. When the ovum is fertilized by the sperm, the first cell of a new individual is formed. This cell splits repeatedly and differs in the various tissues that make up the human being, placing it in the uterus, where it develops in 40 weeks.
The kidneys, key organs of the urinary system, filter almost 1.2 liters of blood per minute, remove waste products and during this process create urine that is stored in the bladder.