Answer:
An organ is a group of tissues that work together to perform a specific function. In the case of your heart, this function is pumping blood throughout your body. Additionally, the heart is largely made up of a type of muscle tissue called cardiac muscle.
Explanation:
Grana (plural) are stacks of flattened sacs
It's granum if it's singular
And those flattened sacs are called thylakoids, which contain chlorophyll
The automatic nervous system is responsible for the internal organs in the human's body and regulation of its functions:<span> the heart rate, digestion, respiratory rate, pupillary response, urination, and sexual arousal.
Unlike </span>the somatic nervous system, the autonomic nervous system <span>consists of a sympathetic and parasympathetic nervous system.</span>
