Dare2Care CNA 2 Practice Exam

Plasma makes up approximately 55% of total blood volume in a healthy adult. Understanding the composition of blood is crucial for anyone studying healthcare, as it informs many aspects of biology and medicine. Blood consists of components such as red blood cells, white blood cells, platelets, and plasma. Plasma itself is primarily composed of water but also contains proteins, electrolytes, hormones, and nutrients, playing a critical role in transporting these substances throughout the body.

Recognizing that plasma constitutes about 55% of the blood helps in understanding various physiological functions, including how nutrients and waste products are transported in the circulatory system. The misconception of higher or lower percentages can lead to misunderstandings about blood composition and its functions in health and disease. This foundational knowledge is vital for healthcare providers in making informed clinical decisions.