Download presentation
Presentation is loading. Please wait.
1
Respiratory handout will be posted
on Friday Quiz #4 available through Friday at 6pm Assignment #2 due Tuesday by 1:40pm! Please print your papers if possible.
2
Fig. 20.1(TE Art) Pulmonary circuit Systemic circuit O2 CO2 O2 artery
vein artery vein Systemic circuit CO2 O2
3
Tunica intima Tunica intima Tunica media Tunica media Tunica externa Tunica externa
5
Conducting (large) artery
Distributing (medium) artery Resistance (small) artery arterioles metarterioles
6
Aneurysm: weak point in an artery or heart wall
common in abdominal aorta renal arteries & brain
7
Cerebral vascular accident (CVA) = stroke
8
Fig. 21.4(TE Art) Carotid body Baroreceptors Aortic body Baroreceptors
Carotid sinus Baroreceptors Common carotid artery Aortic body Aortic arch Baroreceptors
9
Fig. 16.1(TE Art) Glossopharyngeal Nerve (CN IX) Baroreceptors
sense increased blood pressure Vagus nerve (CN X) Heart rate decreases
10
2 ways to maintain constant blood pressure
1. Conducting arteries contract & recoil With increasing and decreasing pressure Carotid sinuses measuring pressure High BP Lower HR
11
Sphincters closed Sphincters open Precapillary sphincters Metarteriole
Venule Arteriole Sphincters closed Sphincters open
12
Fig. 21.5b
13
pericyte Clefts Tight junctions Endothelial cell Continuous Clefts Pores hepatocyte sinusoids Fenestrated
14
Fig. 21.10(TE Art) Distribution of blood Pulmonary 18% Heart 12% Veins
54% Systemic 70% Arteries 11% Capillaries 5%
15
Tunica intima Tunica intima Tunica media Tunica media Tunica externa Tunica externa
16
To heart Valve open Vein Valve closed Contracted skeletal muscles Relaxed skeletal muscles
17
1 capillary bed
18
Pulmonary trunk (artery)
Pulmonary vein
19
Fig (TE Art) 1 capillary bed Portal system (2 capillary beds)
20
hypothalamus Anterior pituitary
21
Hepatic portal system IVC Hepatic sinusoids Gastric veins spleen pan
Superior Mesenteric V
22
Fig. 21.12(TE Art) Portal system Arteriovenous anastomosis
1 capillary bed Portal system (2 capillary beds) Arteriovenous anastomosis Venous anastomoses Arterial anastomoses
23
Internal carotid Vertebral artery
24
Internal carotid Basilar Circle of Willis Vertebral Cerebrovascular Accident = CVA = stroke
26
No fetal circulation……
Similar presentations
