It starts in the sinoatrial node traveling through the atria causing them to pump blood into the ventricles. The RNA is then used to create proteins which form the basis for cells, their activity, and their products.

A faringe é um tubo que serve de passagem tanto para os alimentos quanto para o ar, portanto, faz parte do sistema respiratório e do sistema digestório. Posicións básicas do corpo en medicina [ editar | editar a fonte ] Persoas en posición decúbito ventral. Many diseases affect the reproductive system such as polycystic ovary syndrome (PCOS) which is characterized by elevated androgen levels, menstrual irregularities and/or small cysts on one or both of the ovaries. In multiple sclerosis, the immune system attacks the nerve linings, damaging the nerves' ability to transmit signals.The most contentious disputes are between fine art and erotic images, which define the legal distinction of which images are permitted or prohibited. Read more about the condition New: A new, unread, unused book in perfect condition with no missing or damaged pages. Internally, the female reproductive system contains two ovaries, the uterus, two fallopian tubes and the cervix. It then travels to the atrioventricular node which makes the signal slow down slightly allowing the ventricles to fill with blood before pumping it out and starting the cycle over again.

Cada brônquio penetra em um dos pulmões e divide-se em diversos ramos menores, que se distribuem por todo o órgão formando os bronquíolos. It is caused by the buildup of plaque in the coronary arteries supplying the heart, eventually the arteries may become so narrow that not enough blood is able to reach the myocardium, [18] a condition known as myocardial infarction or heart attack, this can cause heart failure or cardiac arrest and eventually death. Having gallstones is a risk factor for gallbladder cancer which although quite uncommon is rapidly fatal if not diagnosed early. Anatomy advanced further with the invention of the microscope and the study of the cellular structure of tissues and organs.

The EvoBooks develops enriched curriculum content, offering educational materials and interactive 3D models for computers, tablets, smartphones and digital whiteboards. The integumentary system consists of the covering of the body (the skin), including hair and nails as well as other functionally important structures such as the sweat glands and sebaceous glands. The brain is the organ of thought, emotion, memory, and sensory processing; it serves many aspects of communication and controls various systems and functions. Todas as células comparten uns elementos esenciais, como son a membrana envolvente, o citoplasma, rico en orgánulos nas células eucariotas, e un núcleo claramente diferenciado neste tipo de células, cunha membrana nuclear que envolve ao material xenético.