Circulation of fluids Flashcards
Circulation of Fluids (from blood plasma and back to the…)
What does it transport?
From blood plasma to lymph and back to the venous system
* Transports hormones, nutrients, and waste products
What are lymphatic vessels?
What are lymphatic capillaries?
-Are vessels that carry lymph
* Lymphatic system begins with smallest vessels
* Lymphatic capillaries (terminal lymphatics)
Lymphatic Capillaries differ from blood capillaries in four ways
- Start as pockets rather than tubes
- Have larger diameters
- Have thinner walls
- Flat or irregular outline in sectional view
Lymphatic Capillaries are endothelial cells loosely
loosely bound together with overlap
Lymphatic Capillaries overlap as
as one-way valve
The overlap flap of one-way valves allows what to enter and what does it prevent?
Allows fluids, solutes, viruses, and bacteria to enter
* Prevents return to intercellular space
What is the lymph flow
- From lymphatic capillaries to larger lymphatic vessels containing one-way valves
- Lymphatic vessels travel with vein
What are lacteals and what do they transport?
- Are special lymphatic capillaries in small intestine
- Transport lipids from digestive tract
What are the two major lymphatic vessels and where are they located in?
Superficial lymphatics and Deep lymphatics
Are located in:
* Skin
* Mucous membranes
* Serous membranes lining body cavities
Deep lymphatics are larger vessels that accompany
deep arteries and
veins
Superficial and deep lymphatics join to form
large lymphatic trunks
Superficial and deep lymphatic trunks empty into twomajor collecting vessels called
- Thoracic duct
- Right lymphatic duct
The base of the thoracic duct expands into
cisterna chyli
Cisterna chyli receives lymph from:
Right and left lumbar trunks
* Intestinal trunk
which is larger drainage of right lymphatic duct or drainaige of thoracic duct
- Drainage of thoracic duct
