The largest organ in the nervous system; composed of about 100 billion neurons (interestingly, although the neurons contain DNA, there is no DNA replication or mitosis in the brain, as a result the number of neurons decreases as a person ages). 2. Divided into 3 main regions: Cerebrum, Cerebellum, and the Brain Stem.
Which human body part is always black?
Answer: Eumelanin and neuromelanin give a black color to the pigment epithelium of the retina (Figure 5, F), the substantia nigra (“black substance”) in the midbrain (Figure 5, G), and the loci coerulea (“blue spots”) in the pons.
What’s the smallest organ in your body?
Therefore, the Pineal gland is the smallest organ in the body. Note: Pineal gland also plays a role in the regulation of female hormone levels, and it affects fertility and the menstrual cycle.
Do humans have 2 brains?
The human brain is actually two brains, each capable of advanced mental functions. When the cerebrum is divided surgically, it is as if the cranium contained two separate spheres of consciousness.
Which is the heaviest part of human body?
What are the six heaviest organs in the human body?
- The skin is the body’s first heaviest organ, with a mass of 4-5 kg, and a total surface area of about 1.2-2.2 m2. …
- The second heaviest is liver which secretes bile. …
- The third heaviest organ is the brain which is having an average weight of 1500g.
Is skin our largest organ?
Skin is the largest organ of our body. The skin is made up of three main layers: the epidermis, dermis and subcutis.
What are the top 10 body organs?
List of 10 Vital Organs of the Body Essential to Human Life
- Small Intestine.