The Circulatory System

The Circulatory

SystemAnd the Forensic Implications of

Human Anatomy

The Circulatory System:Because blood is so vital to sustaining life, this

system is very important in a death investigation

O What it does:O Pumps blood throughout the body,

delivering oxygen and nutrients to cells

O When cells absorb O2 from blood, they release CO2 and other wastes into the bloodO These wastes are then released into

other organs - such as the kidneys and liver - for elimination

Organs of the Circulatory SystemO The heartO BloodO ArteriesO Veins O Capillarie

s

Blood flow through the heart:

http://www.pbs.org/wnet/redgold/journey/circulation.swf

The system is divided into two pathways:Systemic Pathway

Pulmonary Pathway

O The heart pumps oxygenated blood from the left atrium to the left ventriclethrough arteries

O This blood is exchanged through capillaries to reach each cell in your body

O Cells absorb oxygen throughout body and release wastes

O Veins carry deoxygenated blood, CO2, and other wastes back to the heart (right atrium)

O Veins carry deoxygenated blood back to the right atrium of the heart

O This blood is pumped through the right ventricle and goes to the lungs through the pulmonary arteries

O The lungs have capillaries and tiny alveoli where the blood becomes oxygenated

O The oxygenated blood flows from the lungs and back into the left ventricle of the heart

Warm-UpO Spend the next 5 minutes looking through

your portfolios – especially the guided notes.

O On your portfolio, choose a spot and write the date (4/29/13)

O Then, write at least 3 questions you may have about anatomy or forensic anthropology – we will review before the quiz

Forensic Anthropology ReviewO Take out your Forensic Anthropology

packets from 4/15/13O You will be getting into your expert

groupsO Spend a few minutes reviewing your

article and questionsO Together, you will create a poster to

present to the rest of the classO As each group presents, you must take

notes – this will help you on the quiz!

Teaching Checklist – Stuff to Include on Your Posters:

O Know your vocabularyO Be ready to explain the main take-aways from your

articleO What methods do forensic anthropologists use?O What kinds of observations do they make?

O Be able to explain diagrams and chartsO Discuss the questions, confusions, or points of

disagreement from your expert groups – your home group members may have the same questions or disagreements

O Show your home group members how you answered your questions, not just the answersO What was your evidence and reasoning?

A

B

C

Take some time right now to write your observations about these three different types of muscles in the human body. We will learn why they each look different and how they function during next class.