Lec 9 Circulatory System: Biol 302 Histology Midterm #2

Name the 4 functions and relationships of Circu Sys

1) O2 & nutrients in the blood distributed by the heart.

2) De-O2 blood to the lungs

3) Waste products (i.e. kidney & liver)

4) Transport system

Simple Squamous Epithelium in the Circu Sys is called what?

Endothelium = lines bv + Squamous for diff and transport.

Main Components of Circu Sys

1) Heart - pumps

2) Vascular System - arterial = blood away from heart, venous = blood to heart

3) Lymphatic System - drains fluid back to venous

What system is this? And what are its features?

Lymphatic Sys: collects fluid form CT, bv w/ Endothelium, no RBCs = pink

What system is this?

Lymphatic Sys: collects fluid form CT, bv w/ Endothelium, no RBCs = pink

What are the Components of the Heart/which way does blood flow?

Deoxy blood → RA → RV → PA → Lungs

Oxy blood → LA → LV → Aorta

What is the Heart Partitioning?

Endocardium (in), Myocardium (middle), Epicardium (out, and gets ripped off sometimes)

Which ventricle is this?

LV

What are functions of LV?

1. Gets oxy blood from lungs

2. Pumps into systemic circu

3. BV close to heart have characteristics that match its F

Which ventricle is this?

RV

Identify Which partition this is and Where?

I = Endocardium in Ventricle.

Has simple squam epit and is supported by few fibres of CT.

Identify Which partition this is and Where?

I = Endocardium in Atrium.

Has simple squam epit and is supported by thin layer of DICT.

Identify Which partition this is and Where?

I = Myocardium in Ventricle.

(Char = Cardiac M. Is the thickest layer v/ ventricular folds called trabecular carnae)

Identify Which partition this is?

I = Myocardium in Ventricle.

(Char = Cardiac M. Is the thickest layer v/ ventricular folds called trabecular carnae)

Identify Which partition this is and Where?

I = Myocardium in Atrium.

Has large abundance of Cardiac T

Identify Which partition this is and Where?

I = Epicardium in Ventricle.

Outer mesothelial (simple squam epit) cells missing, supported by DICT on outside and has Loose Unilocular Adipose CT.

Identify Which partition this is and Where?

I = Epicardium (right side) and Myocardium (Left) in Atrium.

Outer mesothelial (simple squam epit), supported by DICT.

Name the Bv Nomenclature for Layers

Tunica intima (inside, endothelium)

Tunica media (middle, smooth M)

Tunica adventitia (area away from lumen/outside, DICT)

Walls ate 1 layer of M, all same direction and not oblique.

What is pictured?

Neuromuscular bundle = vein, artery, and nerve tgth

What are Layers in Veins & Arteries

Tunica externa, media, and intima.

What is pictured?

Neuromuscular bundle = vein (blue), artery (red line), and nerve (white) tgth

Identify what is pictured?

Vein (big Te)

Identify what is pictured?

Artery (big Tm)

Idenitfy the Vessel and what are the Properties?

Large/Elastic Artery

• close to heart

• Ti made of endot + elastin + collagen

• Tm made of elastic F + collagen; Smooth M!

• Te made of DICT w/ vasa vasorum

Identify the Vessel and the Layer pictured

Large/Elastic Artery Ti

Identify the Vessel and the Layer pictured

Large/Elastic Artery Tm!

Identify the Vessel and the Layer pictured

Large/Elastic Artery Ta

Idenitfy the Vessel and what are the Properties?

Large Vein

• returns blood to heart

• Ti made of endot

• Tm made of some elastic F + 5 layers of Smooth M

• Te made of DICT bundles/swirls! w/ vasa vasorum

Identify the Vessel and the Layer pictured

Large Vein Ti

Identify the Vessel and the Layer pictured

Large Vein Tm

Identify the Vessel and the Layer pictured

Large Vein Ta!

Identify the Vessel and the Layer pictured

Medium Artery n/a

Identify the Vessel and the Layer pictured

Medium Artery Ti

Identify the Vessel and the Layer pictured

Medium Artery Tm!

Identify the Vessel and the Layer pictured

Medium Artery Ta

Identify the Vessel and the Layer pictured

Medium Vein n/a

Identify the Vessel and the Layer pictured

Medium Vein Ti

Identify the Vessel and the Layer pictured

Medium Vein Tm

Identify the Vessel and the Layer pictured

Medium Vein Ta!

Identify the Vessel and the Layer pictured

Arteriole and Tm!

Identify the Vessel and the Layer pictured (Top and Bottom in both)

Top = Venule and Ta!

Bottom = Arteriole and Tm!

Identify the Structure(s)

Continuous, Fenestrated, Discontinuous

Identify the Structure(s)

Continuous Capillary

Identify the Structure(s)

Fenestrated Capillary

Identify the Structure(s)

Fenestrated Capillary

Identify the Structure(s)

Capillary

Identify the Structure(s)

Capillary w/ Pericyte

Identify Which partition this is and Where?

Myocardium

Identify Which partition this is and Where?

Myocardium

Identify Which partition this is and Where?

Endocardium

Identify the Vessel and the Layer pictured

Large/Elastic Artery Ti, Tm!, and Ta

Identify the Vessel and the Layer pictured

Medium Artery Ti, Tm!, and Ta

Identify the Vessel and the Layer pictured

Medium/Small? Artery Ti, Tm!, and Ta

Identify the Vessel and the Layer pictured

Arteriole Ti, Tm!, and Ta

Identify the Vessel and the Layer pictured

Large Vein Ta!

Identify the Vessel and the Layer pictured

Medium Vein Ti, Tm, and Ta!