Lab Practical 2 Study Guide: Blood Vessels, Circulation, and Lymphatic System

스터디 가이드 - 스마트 노트

자료에 맞춘 맞춤형 노트, 핵심 정의, 예시, 맥락을 확장해 제공합니다.

Lab Practical 2 Topics Overview

This study guide outlines the key topics and objectives for Lab Practical 2 in Anatomy & Physiology. It covers blood vessels, circulation, and the lymphatic system, focusing on identification, function, and anatomical relationships. Use this guide to prepare for lab exams using models, slides, and diagrams.

Blood Vessels and Vessel Wall Layers

Blood vessels are classified into arteries, veins, and capillaries, each with distinct structural and functional characteristics. Vessel wall layers are important for understanding how blood flows and is regulated throughout the body.

Arteries: Carry blood away from the heart; typically oxygenated except for pulmonary arteries.
Veins: Carry blood toward the heart; typically deoxygenated except for pulmonary veins.
Capillaries: Microscopic vessels where exchange of gases, nutrients, and waste occurs between blood and tissues.
Vessel Wall Layers:
- Tunica intima: Innermost layer, composed of endothelium.
- Tunica media: Middle layer, made of smooth muscle and elastic fibers; regulates vessel diameter.
- Tunica externa (adventitia): Outermost layer, provides structural support.

Major Arteries and Veins: Identification and Function

Recognizing major arteries and veins is essential for understanding systemic and pulmonary circulation. Arteries deliver blood to body structures, while veins drain blood from them.

ARTERIES	VEINS
ascending aorta aortic arch brachiocephalic common carotid subclavian external carotid internal carotid axillary brachial ulnar radial DESCENDING AORTA abdominal aorta celiac trunk superior mesenteric renal gonadal inferior mesenteric common iliac internal iliac external iliac femoral popliteal anterior and posterior tibial CIRCLE OF WILLIS internal carotid anterior cerebral posterior communicating basilar posterior cerebral	superior vena cava azygos brachiocephalic subclavian internal jugular external jugular axillary brachial cephalic ulnar radial inferior vena cava hepatic suprarenal gonadal renal internal iliac external iliac femoral popliteal anterior & posterior tibial HEPATIC (VENOUS) CIRCULATION hepatic portal inferior mesenteric splenic superior mesenteric gastric pulmonary arteries jugular arteries pulmonary veins

ARTERIES

VEINS

ascending aorta aortic arch brachiocephalic common carotid subclavian external carotid internal carotid axillary brachial ulnar radial DESCENDING AORTA abdominal aorta celiac trunk superior mesenteric renal gonadal inferior mesenteric common iliac internal iliac external iliac femoral popliteal anterior and posterior tibial CIRCLE OF WILLIS internal carotid anterior cerebral posterior communicating basilar posterior cerebral

superior vena cava azygos brachiocephalic subclavian internal jugular external jugular axillary brachial cephalic ulnar radial inferior vena cava hepatic suprarenal gonadal renal internal iliac external iliac femoral popliteal anterior & posterior tibial HEPATIC (VENOUS) CIRCULATION hepatic portal inferior mesenteric splenic superior mesenteric gastric pulmonary arteries jugular arteries pulmonary veins

Additional info: The Circle of Willis is a ring-like arterial structure at the base of the brain that provides collateral blood flow.

Blood Pressure: Measurement and Significance

Blood pressure is the force exerted by circulating blood on the walls of blood vessels. It is a vital sign used to assess cardiovascular health.

Measurement: Typically taken using a sphygmomanometer and stethoscope at the brachial artery.
Significance: Indicates the efficiency of the heart and the condition of blood vessels.
Key Terms:
- Systolic pressure: Pressure during heart contraction.
- Diastolic pressure: Pressure during heart relaxation.
Formula:

Identification of Thymus, Tonsils, and Spleen

These lymphatic organs play crucial roles in immune function and blood filtration. Identification on models and diagrams is important for understanding their anatomical relationships.

Thymus: Site of T lymphocyte maturation; located in the mediastinum.
Tonsils: Lymphatic tissue in the pharynx; protects against inhaled or ingested pathogens.
Spleen: Filters blood, recycles old red blood cells, and supports immune responses.

Lymphatic Vessels and Trunks: Identification and Drainage

The lymphatic system returns interstitial fluid to the bloodstream and provides immune defense. Key lymphatic vessels and trunks must be identified on diagrams.

Cisterna chyli: Dilated sac at the lower end of the thoracic duct; collects lymph from lower limbs and abdomen.
Thoracic duct: Main lymphatic vessel draining most of the body.
Right lymphatic duct: Drains lymph from the right upper limb, right thorax, and right side of the head and neck.
Body regions drained: Each trunk drains specific regions; e.g., thoracic duct drains left side of body and lower limbs.

Histology: Identification on Slides

Microscopic examination of lymphatic organs reveals their structural features, which are important for understanding their function.

Lymph nodes:
- Capsule
- Trabeculae
- Cortex
- Medulla
- Medullary cords
- Lymph nodules (follicles) with germinal centers
Spleen:
- White pulp: Lymphatic tissue surrounding central arteries
- Red pulp: Venous sinuses and splenic cords
Tonsils:
- Nodules (follicles)
- Crypts: Invaginations that trap pathogens

Example: On a histology slide, lymph nodes can be identified by their distinct cortex and medulla regions, with follicles containing germinal centers.