Cheek Cell Slides - Nasco

Volume 10

Works

Developed by Linda Roberts Grades 3-8

Cheek Cell Slides (Squamous Epithelial)

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Materials Objectives Students will… • Observe the basic structure of a human cell. • Be able to identify an animal cell by its structure.

• Elementary Microscope with 360° Rotatable Head (Cat. No. SB27572M) • Plastic Microscope Slides, set of 50 slides & cover slips (Cat. No. SB16377M) • Flat Wood Toothpicks, pkg. of 750 (Cat. No. KI01046Y) • Methylene Blue Stain, 10 g (Cat. No. SA09610M)

• Dropping Pipette, 3 ml, pkg. of 100 (Cat. No. SB50474M) • Black Fine-Point Permanent Marker (Cat. No. 9730243) • Cup of Water • Paper Towels

Activity • Give each student a plastic slide, fine-point permanent marker, and a flat toothpick. Have them put their names on the slides using the marker. This helps indicate which side is the right side. • Instruct students to use the flat end of the flat toothpick to gently scrape some of the cheek cells from the inside of their mouth. Note: be careful not to scrape too hard or the toothpick will cut the skin. • Smear the end of the toothpick with the cells onto the middle of the plastic slide. Students may not be able to see anything, but the cells are there. • Add one drop of methylene blue stain. Caution students not to touch the stain as it may stain skin and clothing. Allow the slide to sit for one minute, then dip it into the water to remove excess stain. Carefully blot the slide with a paper towel. Do not rub the slide with the towel. • Have students look at their slides and the slides of other students with the microscope (or you could use a projection microscope to show the slides to the whole class at the same time). Students will see flat irregular cells with a dark nucleus and will discover that cheek cells (squamous epithelial cells) look the same on each slide. For further comparison, you can show students a prepared slide of squamous epithelial cells.

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Student Grade Human Body Slides Fascinating slides with specimens taken from humans. Every slide features an individual description of the related specimen in eight languages. Slides measure 5" W x 11⁄2 H. Packages of 10 slides. All sets come in wooden boxes.

SL10013M

Student Grade Human Body Slide Set. Includes one package of each of Human Body 1(SL10014M) and Human Body 2 (SL10015M). Includes blank slides.

Human Body 1. Includes blood smear, epithelial mouth cells, striate muscle l.s., cerebrum t.s., tonsil with lymph nodules t.s., lung t.s., skin l.s., stomach t.s., red bone marrow, and testis t.s. Includes blank slides. SL10014M Human Body 2. Includes skin section t.s. of hairs, saliva glands t.s., cerebellum t.s., bacteria from intestine, spermatozoa smear, heart muscle t.s. and l.s., bone t.s., liver tissue t.s., intestinal wall t.s., and kidney t.s. of cortical zone. Includes blank slides. SL10015M

1.800.558.9595 • eNasco.com/science Nasco — Fort Atkinson 901 Janesville Avenue Fort Atkinson, WI 53538-0901 E-mail: [email protected]

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February 2015