New User Special Price Expires in

Let's log you in.

Sign in with Facebook


Don't have a StudySoup account? Create one here!


Create a StudySoup account

Be part of our community, it's free to join!

Sign up with Facebook


Create your account
By creating an account you agree to StudySoup's terms and conditions and privacy policy

Already have a StudySoup account? Login here


by: Manny-verda Sindjui
Manny-verda Sindjui
GPA 3.44

Preview These Notes for FREE

Get a free preview of these Notes, just enter your email below.

Unlock Preview
Unlock Preview

Preview these materials now for free

Why put in your email? Get access to more of this material and other relevant free materials for your school

View Preview

About this Document

Course Introduction & Embryonic Development
Human Anatomy & Physiology 1
Stella Evans
Class Notes
25 ?




Popular in Human Anatomy & Physiology 1

Popular in Biology

This 4 page Class Notes was uploaded by Manny-verda Sindjui on Sunday February 7, 2016. The Class Notes belongs to 221 at 1 MDSS-SGSLM-Langley AFB Advanced Education in General Dentistry 12 Months taught by Stella Evans in Winter 2016. Since its upload, it has received 15 views. For similar materials see Human Anatomy & Physiology 1 in Biology at 1 MDSS-SGSLM-Langley AFB Advanced Education in General Dentistry 12 Months.


Reviews for Intro


Report this Material


What is Karma?


Karma is the currency of StudySoup.

You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!

Date Created: 02/07/16
1 BIOL 221 Course Introduction & Embryonic Development Course Introduction Anatomy: Study of body structure (location and composition) Physiology: Study of function of the structure (alone and with other structures)  How do they work together? Levels of Organization: Atoms/Molecules­ smallest stable units of matter Cells­ the smallest living thing in the body Tissue­ groups of specialized cells and cell products that work together to perform specific  functions Organ­ made up of two or more tissues working together to perform one or more specific  functions Organ System­ group of organs that function together in a coordinated manner Organism­ an individual human Homeostasis: ­ Definition­ the existence of  a stable internal environment ­ Conditions that are regulated in the body: o Homeostatic regulation­ ­ Ways homeostasis is maintained: o Autoregulation­ when a cell, tissue, organ, or organ system adjusts in response to some  environmental change 2 Example: When oxygen levels decline in a tissue, the cell release chemicals that widens,  or dilate, blood vessels. Cause an increase in rate of blood flow and provides more  oxygen to region o Extrinsic Regulation­ results from the activities of the nervous system of endocrine  system. Detects an environmental change and send and electrical signal (nervous  system) or chemical messenger (endocrine system) to control or adjust the activities of  another or many other systems simultaneously ­ Feedback Control­ how body maintain homeostasis o Controlled condition­ anything in body being monitored o Stimulus­ anything in body destructing control conditions  o Receptor­ monitors control conditions (chemoreceptors and baroreceptors) Chemoreceptors­ afferent baroreceptor­notice blood pressure low, sends it to efferent pathway to effector o Control center­ receives and processes the info supplied by receptor and sends out  commands. (in charge of brain) o Effector­ cell or organ that responds to the commands of control center and whose  activity either opposes or enhances the stimulus. (makes a change to bring condition  back to normal) ­ Negative Feedback System­ A way of counteracting change  o Examples: the control of body temperature ­ Positive Feedback System­ strengthens or reinforces a change in the controlled condition o Examples: Embryonic Development­ events during first two months after fertilization  ­ Fertilization­ when male and female gametes fuse. 3 ­ Zygote:  o Cleavage­ sequence of cell divisions that begins immediately after fertilization o Morula­ solid ball of cells o Blastocyst­ fluid filled cavity (hollow ball)  Trophoblast­ outer layer of cells  Inner Cell Mass­ lies clustered at one end of the blastocyst ­ Extraembryonic tissues: o Amniotic cavity o Yolk Sac ­ Embryonic disc—three layer sheet: for body of embryo o Ectoderm­ forms o Endoderm  ­ Gastrulation: (germ layers) third layer formed between superficial and deep layers of inner cell  mass  ­ Ectoderm­ forms superficial cells that did not migrate into interior of the blastodisc ­ Mesoderm­ consist of poor organized layer of migrating cells between ecto and endo 4 ­ Endoderm­ consist of cells between 3 embryonic layers called germ cells


Buy Material

Are you sure you want to buy this material for

25 Karma

Buy Material

BOOM! Enjoy Your Free Notes!

We've added these Notes to your profile, click here to view them now.


You're already Subscribed!

Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'

Why people love StudySoup

Steve Martinelli UC Los Angeles

"There's no way I would have passed my Organic Chemistry class this semester without the notes and study guides I got from StudySoup."

Amaris Trozzo George Washington University

"I made $350 in just two days after posting my first study guide."

Jim McGreen Ohio University

"Knowing I can count on the Elite Notetaker in my class allows me to focus on what the professor is saying instead of just scribbling notes the whole time and falling behind."

Parker Thompson 500 Startups

"It's a great way for students to improve their educational experience and it seemed like a product that everybody wants, so all the people participating are winning."

Become an Elite Notetaker and start selling your notes online!

Refund Policy


All subscriptions to StudySoup are paid in full at the time of subscribing. To change your credit card information or to cancel your subscription, go to "Edit Settings". All credit card information will be available there. If you should decide to cancel your subscription, it will continue to be valid until the next payment period, as all payments for the current period were made in advance. For special circumstances, please email


StudySoup has more than 1 million course-specific study resources to help students study smarter. If you’re having trouble finding what you’re looking for, our customer support team can help you find what you need! Feel free to contact them here:

Recurring Subscriptions: If you have canceled your recurring subscription on the day of renewal and have not downloaded any documents, you may request a refund by submitting an email to

Satisfaction Guarantee: If you’re not satisfied with your subscription, you can contact us for further help. Contact must be made within 3 business days of your subscription purchase and your refund request will be subject for review.

Please Note: Refunds can never be provided more than 30 days after the initial purchase date regardless of your activity on the site.