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by Delta25
Last updated 6 years ago

Human Anatomy

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The Human Hand

Nerve Signals

Humans have adapted to be bipedal. Humans very easily walk erect, because their spine has an S-curve. Standing upright puts a lot of downward stress on the body, and having an S-curved spine helps support all of the upper-body weight. Primates, however, do not have an S-curved spine. For example, gorillas have the ability to stand erect, but only for a short period of time. The weight of their upper body is too much for their legs to support alone.



Nerves transmit information by sending electionic signals. The signals are recieved through dendrites, then the signal is sent to the axon which sends the signal to the next nerve cell. However, there are spaces in between each cell called synapes. The message cannot pass as an electronic signal so it is converted into a chemical called a neurotransmitter. This process is repeated in every nerve cell.

Bipedal Structure

Human hands are both similar and different from the hands of other primates. Human and primate hands are similar, because they are structured with four fingers and an opposable thumb. Although this trait is shared, human hands are shorter and broader. Also their thumbs are contain more strength, length, and are more flexible. Having flexible hands help allow humans to do complicated things, such as playing an instrument and writing.

Long childhoods are very important to human children. When children are young, their learning capacity is more open to learning new cultures and languages. This means that if a child is born into more than one culture, he will be able to learn the language spoken at home and the language spoken outside of his home. However, this ability is limited for about 8 or nine years. Human children can very easily learn a language or culture without much teaching. As humans get older, it becomes gradually harder to learn a new language. This is why it is often difficult for high school students or adults to learn a language that is foriegn to them.

A Long Chilhood

The human brain is responsilbe for complex behavior, because it is the control center of the human body.The brain has many different lobes, and each lobe is the main control for multiple parts of the body. The cerebrum is divided into two hemispheres. They are referred to as the left hemishpere and the right hemisphere. The left hemisphere generally controls the right side of the body, and the right hemisphere controls the left side. The hemispheres are divided in six general sections, which are called the frontal lobe, motor cortex, sensory cortex, parietal lobe occipital lobe, and the temporal lobe. Each of those lobes are incharge of one or more ability, including thinking, emotions, personality, movement, sensations, perception, vision, memory, and language.

Human brains are similar and different from the brains of other primates. Humans and primates share common ancesters, so the stucture of the brain is very similar. Human brains and primate brains are both very wrinkly, and they have a more complex cerebrum than other organisms. However, the cerebrum contains even more complexity and is greater in size. For example, the frontal lobe of the human brain is more advanced. Humans show more emotion than primates and also have more self-control.

Responsibilities of the Brain

Human and Primate Brains


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