The Simplest Units of All Matter Are ________, and Many

question 143

Short Answer

The simplest units of all matter are ________, and many of these are essential to life.

---

Definitions:

Efferent Vessel

An efferent vessel is a lymphatic or blood vessel that carries fluid away from an organ or tissue, opposite to an afferent vessel which brings fluid to it.

Afferent Vessel

A vessel that carries blood or lymph fluid towards a particular tissue or organ in the body.

Lymphoid Organ

Lymphoid organs, including the lymph nodes, spleen, and thymus, are part of the immune system and play a role in producing, storing, and carrying white blood cells.

Lymphatic Vessel

A network of thin tubes that transport lymph, a fluid containing white blood cells, throughout the body.