SEATING

CHART!!

Reb

ecca

Jose

ph

Hayden

Wilk

a

Am

berC

hris

Shan

ise

Jess

icaTheron

Stephanie

Isia

hJo

hann

a

JahnayM

ichael

Mel

endy

Kiesha

James

Bad

erJa

nice

Crystal

Board / Projector

Dia

shaw

nSh

elby

Patricia

Block 1 Backdoor

Rak

sha

Kis

haw

ana

Chasaw

anPaige

Nic

kJa

red

Qadr

Chad

Whi

tniq

ueSh

erqu

ileN

aquelle Kim

berly

Ras

hina

Kel

ly A

nn

JeniceTerrance

Euge

neR

adas

ha

LanceK

eziah

Vane

ssa

Tyni

esha

EricJustin

Board / Projector

Kaa

dJe

niva

Kiana

Block 4 Backdoor

Bra

ndon

H.

Jenn

ifer

IeshaJessica

Pati

ceM

oniq

ue

Kaara

Kadeem

H.

Aut

umn

Shan

nae

Dom

oniqueJerem

y

Don

dre

Eliz

abet

h

ShantoiC

layton

Bri

ttan

yPi

erre

Kevin

Tedesha

Ale

xJu

an

Kadeem

Terrece

Board / Projector

Wah

eed

Azi

za

Brandon D

.

Block 5 Backdoor

WARM UP QUIZ (5 MIN) What are the 2 Jobs of the Respiratory System?

#1 - MOVES OXYGEN FROM THE OUTSIDE ENVIRONMENT INTO THE BODY

#2 - REMOVES CARBON DIOXIDE AND WATER FROM THE BODY

Bronchi keep dividing until they _____________________ (ends) in air sacs called alveoli Terminates

THE EXECRETOR

Y SYSTEMMr. Mah

Living EnvironmentLecture 6

AIM: HOW DOES THE

EXCRETORY SYSTEM HELP US MAINTAIN

HOMEOSTASIS?

THE EXCRETORY SYSTEM

FUNCTIONS OF THE EXCRETORY SYSTEM

maintain homeostasis

Remove wastes through excretion (urination).

HOMEOSTASIS Regulates the chemical

composition (what chemicals and how much of each chemical) of body fluids by removing wastes and keeping the right amounts of water, salts, and nutrients.

The average adult produces 1.5 Liters of urine a day.

EXCRETION The skin excretes excess water and salts in the form of sweat.

The lungs excrete carbon dioxide.

The kidneys also play a major role in excretion.

THE KIDNEYSremove waste products from the blood.

maintains blood pH.regulate the water content of the blood and, therefore, blood volume.

BLOOD FLOW Blood enters the kidney through

the renal artery.

The kidney removes urea, excess water, and other waste products through filtration and passes them to the ureter.

The clean, filtered blood leaves the kidney through the renal vein and returns to the body.

KIDNEY STRUCTURE  A kidney has two distinct regions: The inner part is called the renal medulla.

The outer part is called the renal cortex.

URETER A tube, called the ureter, leaves each kidney, carrying urine to the urinary bladder.

There are two tubes, one from each kidney.

BLADDER The urinary bladder is a saclike organ where urine is stored before being excreted.

A full bladder holds about 500mL of urine

URETHRA The tube that leads from the bladder to the outside of the body.

The urethra is of different lengths in each sex.Males – about 8 inchesFemales – about 1.5 inches

KIDNEY DISORDERS Humans have two kidneys, but can survive with only one.

If both kidneys are damaged by disease or injury, there are two options: a kidney transplant kidney dialysis

EXCRETORY SYSTEM PROBLEMS Kidney stones – crystallized

mineral salts and uric acid saltsin the urine. Stones block flow of urine and cause excruciating pain.

Kidney failure - can be caused by long-term diabetes, infections, physical injuries, chemical poisoning. Causes toxic materials to build up to lethal levels.