Human characteristics include aspects such as standing upright, using tools to gather food or kill animals, and evolving different body shapes. Other aspects include brains that are continually growing bigger and more complex, using symbols and language, and developing a social system.Know More
Over the past several million years of evolution, certain unique characteristics have defined the human species. Perhaps the most significant is the ability of the species to stand and walk in an upright position. This enables the human being to hunt, move easily from place to place and defend themselves from attacks by predators.
The human body and brain evolved and changed more than any other species. The shape of the body evolved according to the regions and climates and helped the species to survive. The human brain from the earliest origins of man to the present day, has expanded and grown in complexity and ability. It has learned to adapt to changing needs and environmental factors, leading to the supremacy of the species. Key human characteristics, such as making and using tools and weapons, developing a system of communication through symbols and sounds, and developing social, political and economic systems of interaction, have contributed significantly to the survival of the species.Learn more about Human Anatomy
The normal human colon is about 5 feet long. Its main purpose is to hold and dry out waste material produced by digestion. The gut flora in the colon break down materials that remain unabsorbed.Full Answer >
When the human circulatory system and veins are stretched out in a straight line, it has a total length of approximately 60,000 miles. The human veins circulate approximately 6 quarts of blood throughout the body on a daily basis.Full Answer >
Human ventilation is also carried out by the respiratory system. It is used to breathe in oxygen for natural processes and then expel gaseous wastes, such as moisture, carbon dioxide and trace amounts of other gases. This system gives oxygen directly to the blood; the blood distributes the oxygen everywhere else.Full Answer >
The average size of the human mouth is 50 millimeters. The size of the mouth varies according to the size of the head. People with larger heads tend to have bigger mouths. As children grow older, the jaw bones tend to widen and the mouth gradually becomes bigger.Full Answer >