Cell walls are thick but flexible used as support

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ble fruits and vegetables. • Collenchyma: Long cells that are alive at maturity, but no longer divide. Cell walls are thick, but flexible. Used as support cells. Examples: Celery strings. • Sclerenchyma: Cells that may be long and stringy or short and blocky, but have thick cell wall stiffened with lignin. Used as support. Examples: “pear grit” (the gritty cells in the flesh of pears), plant fibers such as linen and hemp, cells that form nut shells. • Vascular tissue • Xylem: composed of hollow, dead cells that transport water and dissolved minerals from roots to leaves. Notes Biology 103, Spring 2008 Dr. Karen Bledsoe http://www.wou.edu/~bledsoek/ • Phloem: made up of living cells that transport dissolved sugars either up or down plant as needed. • Plant organs: • Leaves: made up of a blade and a petiole. On the underside, stomata, allow air into and out of the spongy ground tissue, the mesophyl, where photosynthesis takes place. Vascular bundles bring water into a leave, and carry sugars away. • Stems: supports the leaves and...
View Full Document

This document was uploaded on 02/25/2014 for the course BIOLOGY 103 at Western Oregon University.

Ask a homework question - tutors are online