Warm – up 8/18-19/ Essentials: stem cell research rubric. - Warm-Up: - Sit with your group for the debate. You will have 20 minutes to collaborate with each other. Agenda  DOL: Scholars will be able to understand ethically debates around stem cell research and identify tissue types.  Homework: continue reading Chap. 5, Connective tissue IP, Debate reflection essay (1pg. Double spaced, pen) - Announcements: - Reflection due and Lab on Thurs/Fri - Connective Tissue IP due Monday - Test August 28 th

HeLa Cells A HeLa cell (also Hela or hela cell) is a cell type in an immortal cell line used in scientific research. It is the oldest and most commonly used human cell line. The line was derived from cervical cancer cells taken from Henrietta Lacks, a patient who eventually died of her cancer on October 4, Article on Henrietta Lacks

HeLa Cells Debate Intro  PY6Zq0 PY6Zq0  microscopic/hela-cell.htm microscopic/hela-cell.htm

Rules of Debate  Timer set for 30 minutes  Counts as a quiz grade!  Review rubric!

Debate Reflection  For homework tonight, I want you to write a reflection paper of our debate.  Your responses must be thoughtful and reflective IB Traits: REFLECTIVE, COMMUNICATOR

4 types of tissues  1. epithelial tissue  2. connective tissue  3. muscle tissue  4. nervous tissue

Epithelial tissue includes…  1. layers of cells that cover internal or external surfaces  2. glands

Some important characteristics are…  1. cells are close together  2. a free surface exposed to environment or internal chamber/passageway.  3. attachment to basement membrane  provides barrier  4. no blood vessels (avascular)  5. continually replaced and regenerated

Functions of epithelia…  1. Provide physical protection  2. Control permeability  What comes in and out  3. provide sensation  4. produce specialized secretions  Exocrine= secretions released to surface of skin  Endocrine= secretions released as hormones into tissue fluid & blood

Warm – up 8/20-21/ Essentials: Epithelial Chart, Cheek cell lab, exit ticket slip - Warm-Up: - Turn in your reflective essay (staple to rubric) - Label the tissue types (Tissues IP) Agenda  DOL: Scholars will be able to identify epithelial and tissue types by cell structures.  Lab: Cheek cells and epithelial layers  Homework: Tissue Poster  Reading Chap. 5, Connective tissue IP - Announcements: - Quiz Monday - Connective Tissue IP due Monday - Tissue Posters (DUE WEDNESDAY) - Test August 28 th / Review on Wednesday

Epithelial cells are classified by amount of layers and shape…  Simple = one layer  stratified = multiple layers  Pseudostratified = looks like multiple layers  Squamous = thin/flat  Cuboidal = shaped like a cube or hexagon (6)  Columnar = long and skinny  Ciliated = contain cilia LAYERSSHAPE

An example…  One layer with tall and skinny cells  Simple columnar  Multi-layered and square shaped  Stratified cuboidal

Pseudostratified Ciliated Columnar  Location: respiratory tract (nasal cavity, larynx, trachea, bronchi)  Function: cilia moves mucus across the surface of the cells, protection

Glands  Endocrine glands – secrete hormones directly into the bloodstream  Hormones are chemical messengers that influence cells in the rest of the body  Exocrine glands – use different processes to release secretions  Ex: sweat glands, mammary glands, salivary glands

The purposes of Connective Tissue…  Bind (hold things together)  Support & protect  Fill spaces  Store fat  Produce blood cells

 Locations:  Widely distributed throughout the body  Facts:  Good blood supply  Farther apart than epithelial cells  Connected with matrix

Exit Tickets 1. a single layer of cells that are thin and flat are called: 2. a multi-layered group of cells that are long and skinny are: 3. a single layer of square cells 4. What connective tissue is responsible for storage of energy?  SHOUT OUTS!

Warm – up 8/20-21/ Essentials: Types of epithelial tissue, sheet of legal paper, quiz sheet, Tissue review packet (1per table) CLASS SET! - Warm-Up: - At your table review types of tissues and their function. 5 minutes - QUIZ TODAY! Agenda  DOL: Scholars will be able identify tissue types and relate its structure to function by location.  Homework: Tissues posters (quiz grade) - Announcements: - Test August 28 th - Test review Wednesday come prepared!

Classification of Connective Tissue 1. Connective tissue proper a. Loose connective tissue i. Areolar ii. Adipose iii. Reticular b. Dense connective tissue 2. Supporting connective tissue a. Cartilage b. Bone 3. Fluid connective tissue a. Blood

1.a. Loose Connective Tissue  lies under skin, connect it to organs, provides blood supply  The body’s “packing material”

1.a.i. Areolar  Function: Protects tissues and organs, binds epithelia to deeper tissue  Location: dermis (skin)

1.a.ii. Adipose  Function: stores energy, insulates & cushions  Location: subcutaneous layer (deep to skin), surrounding organs

1.a.iii. Reticular  Function: provides support to lymphatic system organs  Location: spleen, lymph nodes, thymus, bone marrow

1.b. Dense Connective Tissue  very STRONG, used to bind parts together  Function: attaches bone to bone (ligaments), muscle to bone (tendon)  Location: ligaments, tendons

1.b. Dense Connective Tissue  Ligaments  Connects BONE to BONE  Tendons  Connect MUSCLES to bone

2.a. Cartilage  Function: Protects, absorbs shock (in joints)  Location: tip of nose, ends of long bones, intervertebral discs, external ear

2.b. Bone  very rigid, heals quicker than cartilage  Function: provides support (more than cartilage) and levers for movement  Location: bones of the body

3.a. Blood  Function: helps transport and maintain internal environment  Location: blood vessels, heart

Tissue Rotations and Cheek cell Lab

Station Expectations  One group at each station  2 min at each station  Rotate clockwise

Tissue Posters  Four types of tissue  Location of tissue  Purpose/function of each tissue  Classification of tissue  Memory Device (How you will remember each type)  Drawing of each type of tissue  Creativity/color  Neatness This will count as a quiz grade!