Ch.4 Lesson 2Ch.4 Lesson 2

How do stems How do stems & roots help & roots help a plant?a plant?

stems• have 2 special tissues:

1.xylem tissue- carry materials from roots leaves

xylem

xylem

2.phloem tissue- carry sugar away from leaves

phloem

kinds of stems

woody non-woody

lots of xylem tissue

less xylem tissue

examples: trees

& shrubs

examples: pea plants & dandelion

woody stem non-woody stem

functions of roots

•anchor plant - hold it in place

•some store food•absorb water from soil- enters thru. root hairs

2 kinds of root systems

taproot fibrous roots

large root that grows

straight down

many roots grow in

all directionsYoutube-Plant parts song