Human-Physiologybody-Fluids-And-Circulation-1

Blood: Vital fluid in the body responsible for transporting oxygen, nutrients, hormones, and waste products.

Components of Blood: Comprises plasma (55% of volume), red blood cells (RBCs) (45% of volume), and white blood cells (WBCs).

Plasma: Liquid portion with water, electrolytes, proteins, hormones, and waste. Facilitates nutrient transport and temperature regulation.

RBCs (Erythrocytes): Mainly transport oxygen to tissues and return carbon dioxide to the lungs. Contain hemoglobin for oxygen binding.

WBCs (Leukocytes): Integral to the immune system’s defense against infections and pathogens.

Types of WBCs: Include neutrophils (rapid infection responders), lymphocytes (specific immune response and antibody production), monocytes (phagocytic cells), eosinophils (combat parasites and modulate immune response), and basophils (inflammatory and allergic responses).

Neutrophils: Abundant and engulf bacteria.

Lymphocytes: Responsible for immune responses and antibody production.

Monocytes: Large phagocytic cells that ingest pathogens and aid in tissue repair.

Eosinophils: Combat parasites and modulate immune responses.

Basophils: Involved in inflammatory and allergic responses, release histamines.