Human body structure diagram male

The basic enterprise of human anatomy is the somatic cell. There is a non-cellular structural substance in the middle of the somatic cell, which is called interstitium. Cell structure can be divided into three parts: cytoplasm, nucleus and cytoplasm. Epithelial cell tissue is divided into three categories: coated epithelial cells, glandular epithelium, and sensory epithelial cells. The human body structure diagram. The key difference between men and women depends on the male reproductive organs, and there is no other difference.

The total blood volume of the body is approximately 8% of the body weight. If excessive blood loss exceeds 20% of the blood bar in the human body at one time, life activities will be hindered. Healthy people can generally recover quickly if they lose no more than 10% of their blood at a time.

There are approximately 639 muscles in the body. It is composed of approximately 6 billion muscles, the largest of which is 60 centimeters long, and the smallest is only about 1mm. A large muscle weighs 2000 and a small muscle only weighs 2000. The average person's muscles account for 35%-40% of their body weight. The total length of capillaries in muscles reaches more than 100,000 kilometers, which can circle the earth several and a half times.

Bones are the hard tissue of the body or skin of humans or small animals. There are two types. The skeletons of humans and higher animals are composed of many bones in the body, called endoskeleton. ； The shells outside the bodies of arthropods and mollusks and the scales and armor on the epidermis of some vertebrates (such as fish, turtles, etc.) are called exoskeletons. The skeleton generally refers to the endoskeleton. Bones are hard human organs that make up the endoskeleton of vertebrates. Their function is to exercise, support and protect the human body. ； Low production of red blood cells and white blood cells ； Store minerals. Bones are composed of a variety of different shapes, with complex contents and external structures that allow bones to remain strong while reducing weight. One of the components of bone is mineralized bone tissue, which has a hard honeycomb-shaped three-dimensional structure inside. ； Other tissues include bone marrow, periosteum, nerves, blood vessels and cartilage. The bones of the body play a role in supporting the human body and are part of the body's endocrine system. An adult has 206 bones. Bones are generally connected to each other by joints and tendons.

The human brain is composed of about 14 billion cells and weighs about 1,400 grams. The thickness of the cerebral cortex is about 2-3 mm and covers an area of ​​about 2,200 cubic centimeters. According to statistics, 1,000 to 100,000 cerebral nerves die every day (the less you use your brain, the more brain cells die). The capacity of a person's brain to store information is equivalent to 10,000 libraries with 1,000 books. People who are best at using their brains only use 10% of their brain capacity in their lives. The main component of the human brain is water, accounting for 80%. Although it only accounts for 2% of the body's weight, it consumes 25% of the whole body's oxygen consumption, and its blood volume accounts for 15% of the heart's blood output. The blood flowing through the human brain in a day is 2,000 liters. The energy consumed by the human brain is approximately equal to 25 watts if expressed in rated power.