Back to Biology Notes
blood tissue fluid lymph
A LevelBiology~4 min read
Overview
This lesson explores the intricate relationship between blood, tissue fluid, and lymph, understanding their composition, formation, and roles in nutrient delivery, waste removal, and immunity. We will examine how these fluids facilitate transport and exchange within the body's tissues.
Composition and Function of Blood
Blood is a vital fluid that circulates throughout the body, performing numerous essential functions. It is composed of two main parts: **plasma** (approximately 55% of blood volume) and **blood cells** (approximately 45%). **Plasma** is a straw-coloured liquid primarily made of water (90%), but als...
Unlock 4 More Sections
Sign up free to access the complete notes, key concepts, and exam tips for this topic.
No credit card required · Free forever
Key Concepts
- Blood: A specialised connective tissue comprising plasma, red blood cells, white blood cells, and platelets, responsible for transport throughout the body.
- Tissue Fluid (Interstitial Fluid): The fluid surrounding tissue cells, formed from blood plasma, facilitating exchange of substances between blood and cells.
- Lymph: A clear fluid derived from tissue fluid, transported by the lymphatic system, playing a crucial role in immunity and fat absorption.
- Hydrostatic Pressure: The pressure exerted by a fluid, a key factor in the formation of tissue fluid at the arterial end of capillaries.
- +2 more (sign up to view)
Exam Tips
- →Clearly differentiate between the composition and function of blood, tissue fluid, and lymph. Use comparative tables if helpful for revision.
- →Understand the opposing forces of hydrostatic pressure and oncotic pressure in the formation and reabsorption of tissue fluid. Be able to explain how these pressures change along the capillary.
- +3 more tips (sign up)
More Biology Notes