What is the difference between the afferent and efferent lymphatics?
Lymph vessels that carry lymph to a lymph node are called afferent lymph vessels, and those that carry it from a lymph node are called efferent lymph vessels, from where the lymph may travel to another lymph node, may be returned to a vein, or may travel to a larger lymph duct.
What is the lymphatic drainage of the scalp?
Lymphatic drainage The part of the scalp that is anterior to the auricles is drained to the parotid, submandibular, and deep cervical lymph nodes. The posterior part of the scalp is drained to the posterior auricular (mastoid) and occipital lymph nodes.
What is the lymphatic drainage of the head and neck?
LYMPHATIC DRAINAGE OF THE HEAD & NECK. All the lymph from the region of head and neck drains into deep cervical lymph nodes. The efferents from these nodes form the jugular trunk. On the right side, jugular trunk drains into right lymphatic duct.
What is the difference between afferent vessels and efferent vessels?
Afferent lymphatic vessels flow into a lymph node and carry unfiltered lymph fluid. Efferent lymphatic vessels flow out of a lymph node and carry filtered lymph fluid.
What is the correct order of lymphatics from smallest to largest diameter?
The correct answer is e. Lymphatic capillaries – lymphatic vessels – lymphatic duct – subclavian vein.
How does lymph differ from plasma?
Lymph: It is an interstitial fluid, present between the cells of a tissue….4 Difference between Plasma and Lymph.
| Plasma | Lymph |
|---|---|
| Flows within blood vessels | Flows within lymphatic vessels |
| Can coagulate because it contains fibrinogen and prothrombin. | Can coagulate but very slowly because it contains these two in small quantities. |
What is safety layer of scalp?
L- Loose areolar tissue: It is made up of loose areolar tissue. It is traversed by emissary veins which connect the veins in the second layer of scalp with intracranial dural venous sinuses. It acts as a natural plane of cleavage during craniotomy. It is also known as the ‘dangerous layer of scalp’.
What are the lymph nodes of the head and neck called?
Anterior cervical group: superficial anterior jugular chain, prelaryngeal and pretracheal lymph nodes. Retropharyngeal group: lateral and medial retropharyngeal lymph nodes.
How many lymph nodes are in the head?
300 lymph nodes
Lymph fluid ultimately returns to the venous circulation. Lymph nodes are present throughout the body. The head and neck region contains over 300 lymph nodes, of which include the supraclavicular lymph nodes.
What is the difference between efferent arteriole and afferent?
The main difference between afferent and efferent arterioles is that afferent arterioles carry blood to the glomerulus whereas efferent arterioles take the blood away from the glomerulus. An afferent arteriole is a branch of the renal vein, which carries blood containing nitrogenous wastes.
What’s the difference between afferent arteriole and efferent arteriole?
Afferent arteriole is a branch of the renal artery that brings in blood to the glomerulus. Efferent arteriole is a branch of the renal artery that drains blood away from the glomerulus.
What is the difference between afferent and efferent lymphatic vessels?
Afferent lymphatic vessels drain the lymph from the tissues toward the lymph nodes. Efferent lymphatic vessels leave the lymph nodes and carry the lymph toward the subsequent lymph nodes or toward the lymphatic trunks and ducts and subsequently to the subclavian veins. The deep lymphatic vessels usually follow…
What are afferent and efferent neurons?
Afferent neurons are also known as sensory neurons, and efferent neurons are also known as motor neurons. However, the effect (stimuli and the responses) of sensory and motor neurons are slightly different from that of afferent and efferent neurons. Sensual perceptions of the body are eye, nose, ear, tongue, and skin.
What are affafferent lymphatics?
Afferent lymphatics are blind-ended vessels that arise in and permeate the tissues and selectively convey lymphocytes and antigen-presenting accessory cells into the subcapsular and medullary sinuses of lymph nodes.
What is the phenotype of affafferent lymph T cells?
Afferent lymph T cells exhibit an activated phenotype compared to efferent lymph cells, with a higher proportion of T cells expressing interleukin (IL)-2Rα (CD25) and major histocompatibility complex (MHC) class II DQ antigens (Table 1).