The
skin is the tissue designed to regulate temperature,
secrete lubricants, and protect the body from <span>harmful
substances. It is one of the largest organs in the body and consists of two
layers --- the epidermis and the dermis. Its three main functions are to
protect, regulate, and sense.
It serves as the primary barrier of the body from impacts and pressure,
variations in temperature, radiation and chemicals, and micro-organisms. It
regulates body temperature through sweat and hair and is a reservoir for
Vitamin D synthesis. As a sensory organ it has a network of nerve cells that
detect and relay changes in the environment through heat, cold, touch, and
pain. </span>
An endocrine structure in the male reproductive system is the testes or also called gonads.
The testes is identified as an endocrine gland due to its ability to secrete hormones such as the testosterone. This hormone is necessary in the development of the male physiological characteristics and contributes to the formation of the secondary sex characteristics.
I believe that the answer would be D., Water.
Water gives you alot of energy, believe it or not. If you
were not to drink water for days, you will feel very lazy
and down.
Hope this helps!
