Lab # 4 - Plant Anatomy

Lab # 4 - Plant Anatomy - Plant Anatomy Lab # 4 Plant...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

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

Unformatted text preview: Plant Anatomy Lab # 4 Plant Anatomy Three Main Organs o The leaves o The stem o The root o Each organ is made up of one or more types of cells Types of Tissues o Simple tissue Those composed of a single type of cell o Complex tissue Those composed of two or more types of cells Three Main Tissue Systems o Dermal tissue system Consists of the tissue covering the body, i.e., the epidermis and, in plants that exhibit more extensive secondary (woody) growth, periderm Two dermal tissues: Both are complex tissues Epidermis o Can consist of epidermal cells, guard cells that surround stomata, and a number of other specialized cells Periderm o A complex tissue that includes, among other types of cell, cork o Vascular tissue system Consists of the conducting tissues of the plant, xylem and phloem Two major vascular tissues: Xylem o The major conducting tissue for water and mineral nutrients o A complex tissue that can consist of parenchyma cells, sclerenchyma cells, and the tracheary elements (the actual conducting cells) o The tracheary elements are either tracheids or vessel memebers Phloem o The major conduit responsible for the movement of photosynthate and other organic molecules throughout the plant o A complex tissue, and may consist of parenchyma cells, sclerenchyma cells, and the sieve element (the actual conducting cells) o The major sieve element in flowering plants is the sieve-tube member o Ground (or fundamental ) tissue system Consists of the remaining tissues in the plant Three ground tissues: All are simple tissues Parenchyma tissue o Composed of parenchyma cells o Most abundant type of cell in the plant body o Functions Photosynthesis Storage o Retain their ability to divide and differentiate, so they are also important in the healing of wounds or other damage o Cells are alive at maturity and have an evenly thickened cell wall Collenchyma tissue o Composed of collenchyma cells o Cell are also alive at maturity and are characterized by having unevenly thickened cell walls o Function Support, particularly for delicate tissues (such as flower petals) and parts that are still growing Sclerenchyma tissue o Composed of sclerenchyma cells o Cells are dead at maturity and are characterized by having a thick, lignified cell wall o Function Support Tissue System Tissue Tissue Type Cell Types Function(s) Ground (=Fundamental) Parenchyma Collenchyma Sclerenchyma Simple Simple Simple Parenchyma Collenchyma Sclerenchyma Photosynthesis, storage, many others Support Support Vascular Xylem Phloem Complex...
View Full Document

Page1 / 8

Lab # 4 - Plant Anatomy - Plant Anatomy Lab # 4 Plant...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online