anatomi sistem limfatik (dr. diah)

Download Anatomi Sistem Limfatik (Dr. Diah)

Post on 01-Mar-2016

29 views

Category:

Documents

1 download

Embed Size (px)

DESCRIPTION

ppt kuliah

TRANSCRIPT

  • THE LYMPHATIC SYSTEMS

    Dyah Purnaning

    ANATOMY DEPARTMENT UNIVERSITY OF MATARAM

  • THE LYMPHATIC SYSTEMSConsists of two semi-independent parts

    A meandering network of lymphatic vessels

    Lymphoid tissues and organs scattered throughout the body

  • THE LYMPHATIC SYSTEMSincludes :lymphlymphatic vesselslymphatic tissuelymphatic noduleslymph nodestonsilsspleenthymus

  • THE LYMPHATIC SYSTEMS

  • Functions

    helps to maintain fluid balance in tissues

    absorb fats from the digestive tract

    part of the bodys defense system against microorganisms and other harmful substances.THE LYMPHATIC SYSTEMS

  • 1. Fluid balance

    Approximately 30 L of fluid pass from the blood capillaries into the interstitial fluid each day.

    Only 27 L pass from the interstitial fluid back into the blood Capillaries.

    THE LYMPHATIC SYSTEMS

  • The 3 L of fluid enters the lymphatic capillaries the fluid is called lymph passes through the lymphatic vessels back to the blood THE LYMPHATIC SYSTEMS

  • THE LYMPHATIC SYSTEMS

  • 2. Fat absorption.

    The lymphatic system absorbs fats and other substances from the digestive tract.

    Special lymphatic vessels called lacteals are located in the lining of the small intestine (villus).THE LYMPHATIC SYSTEMS

  • Fat absorption.

    Fats enter the lacteals and pass through the lymphatic vessels to the venous circulation.

    The lymph passing through these lymphatic vessels has a milky appearance because of its fat content and is called chyleTHE LYMPHATIC SYSTEMS

  • 3. Body`s Defense.

    Microorganisms and other foreign substances are filtered from lymph by lymph nodes and from blood by the spleen. THE LYMPHATIC SYSTEMS

  • In addition to water, LYMPH contains solutes derived from two sources:

    substances in plasma, such as ions, nutrients, gases, and some proteins that pass from blood capillaries into the interstitial fluid

    (2)substances derived from cells, such as hormones, enzymes, and waste productsTHE LYMPHATIC SYSTEMS

  • Main structures of the lymphatic system Lymphatic vessels Lymphatic vessels collect tissue fluid from loose connective tissue Carry fluid to great veins in the neck Fluid flows only toward the heartTHE LYMPHATIC SYSTEMS

  • LYMPHATIC VESSELS

  • FUNCTIONS

    Collect excess tissue fluid and blood proteins

    Return tissue fluid and blood proteins to bloodstreamLYMPHATIC VESSELS

  • Lymph capillariesSmallest lymph vessels, first to receive lymphLymphatic collecting vesselsCollect from lymph capillariesLymph nodesScattered along collecting vesselsLymph trunksCollect lymph from collecting vesselsLymph ductsEmpty into veins of the neckLYMPHATIC VESSELS

  • LYMPHATIC CAPILLARIESLymph capillariesSmallest lymph vessels (dead-end tubes) Located near blood capillariesFirst to receive lymphLymphatic capillaries are in almost all tissues of the body.Except :The central nervous system, The bone marrow, Tissues without blood vessels such as cartilage, epidermis, and the cornea.Lacteals specialized lymphatic capillaries, Located in the villi of the small intestines (Receive digested fats Fatty lymph /chyle)

  • Location and Structure of Lymphatic CapillariesLYMPHATIC CAPILLARIES

  • Lymphatic capillaries differ from blood capillaries :

    Lymphatic capillaries lack a basement membrane

    The cells of the simple squamous epithelium slightly overlap and are attached loosely to one anotherLYMPHATIC CAPILLARIES

  • Two things occur as a result of this structure.

    First, the lymphatic capillaries are far more permeable than blood capillaries, and nothing in the interstitial fluid is excluded from the lymphatic capillaries Highly permeability allows entrance of Tissue fluid, Bacteria, viruses, and cancer cellsLYMPHATIC CAPILLARIES

  • 2.Second, the lymphatic capillary epithelium functions as a series of one-way valves that allow fluid to enter the capillary but prevent it from passing back into the interstitial spaces.LYMPHATIC CAPILLARIES

  • LYMPHATIC CAPILLARIESLocation and Structure of Lymphatic Capillaries

  • LYMPHATIC COLLECTING VESSELSAccompany blood vesselsComposed of the same three tunics as blood vesselsThe inner layer of the lymphatic vessel consists of endothelium surrounded by an elastic membraneThe middle layer consists of smooth muscle cells and elastic fibersThe outer layer is a thin layer of fibrous connective tissue.

  • LYMPHATIC COLLECTING VESSELSTo helps direct the flow of blood Contain more valves than veins do

    Lymph propelled byBulging of skeletal musclesPulsing of nearby arteriesTunica media of the lymph vessels

  • LYMPH NODES

    Cleanse the lymph of pathogensHuman body contains around 500 Lymph nodes are organized in clusters

  • FUNCTIONSfilter the lymph preventing the spread of microorganisms and toxins that enter interstitial fluids.destroy bacteria, toxins, and particulate matter through the phagocytic action of macrophages.produce antibodies through the activity of B cells.LYMPH NODES

  • Microscopic Anatomy of a Lymph NodeFibrous capsule surrounds lymph nodesTrabeculae connective tissue strandsLymph vesselsAfferent lymphatic vesselsEfferent lymphatic vesselsLYMPH NODES

  • LYMPH NODES

  • LYMPH NODES

  • LYMPH TRUNKSLymphatic collecting vessels converge (after passing the lymph nodes)

  • LYMPH TRUNKSFive major lymph trunks Lumbar trunkReceives lymph from lower limbs, pelvic and abdominal walls, pelvic organs, ovaries or testes, kidneys, and adrenal glands2. Intestinal trunkReceives chyle from digestive organs (stomach, pancreas, spleen, and liver)3. Bronchomediastinal trunksCollects lymph from thoracic viscera (thoracic organs and the deep thoracic wall)

  • LYMPH TRUNKSFive major lymph trunks cont

    4. Subclavian trunksReceive lymph from upper limbs, superficial thoracic wall, and mammary glands5. Jugular trunksDrain lymph from the head and neck

  • LYMPH TRUNKS

  • LYMPH DUCTSThe lymphatic trunks connect to large veins in the thorax or join to yet larger vessels called lymphatic ducts.

  • LYMPH DUCTSCisterna chyliLocated at the union of lumbar and intestinal trunks

    Thoracic ductAscends along vertebral bodiesEmpties into venous circulation Junction of left internal jugular and left subclavian veinsDrains three quarters of the body

    Right lymphatic duct Empties into right internal jugular and subclavian veins

  • Lymphatic ducts then connect to the large veins

    The connections of the lymphatic trunks and ducts to veins are quite variable Many connect at the junction of the internal jugular and subclavian veins, but connections on the subclavian, jugular, and even brachiocephalic vein exist.LYMPH DUCTS

  • LYMPH DUCTS

  • On the right side, the jugular, subclavian, and bronchomediastinal trunks typically join a thoracic vein separately.

    About 20% of the time, the three trunks join together to form a short duct 1 cm in length called the right lymphatic duct which joins a thoracic vein

    These trunks drain the right side of the head, right-upper limb, and right thorax

    The right side of the body inferior to the thorax and the entire left side of the body mostly drain through the thoracic ductLYMPH DUCTS

  • LYMPH DUCTS

  • Overview of the Lymph Nodes, Trunks, and Ducts

  • DISORDERS OF THE LYMPHATIC SYSTEMSChylothorax- Leakage of fatty lymph into the thoraxLymphadenitis- is an inflammation of the lymph nodes, which causes them to become enlarged and tender. This inflammation is an indication that microorganisms are being trapped and destroyed within the lymph nodesLymphangitis- Inflammation of a lymph vessel

  • Lymphoma- is a neoplasm (tumor) of lymphatic tissue- typically, lymphomas begin as an enlarged, painless mass of lymph nodes. The immune system is depressed, and the patient has an increased susceptibility to infections.

    1. Hodgkins 2. Non-Hodgkins DISORDERS OF THE LYMPHATIC SYSTEMS

  • Elephantiasisis caused by long, slender roundworms (Wuchereria bancrofti). The adult worms lodge in the lymphatic vessels and block lymph flow. The resulting accumulation of fluid in the interstitial spaces and lymphatic vessels can cause permanent swelling and enlargement of a limb.

    DISORDERS OF THE LYMPHATIC SYSTEMS

  • SELAMAT BELAJAR(^_^)