Lesson 21.3: Vocabulary I Match the vocabulary word with the proper definition.

Definitions

H 1. muscle tissue that is attached to bone

2. long, thin muscle cell that has the ability to contract, or shorten

3. theory that explains muscle contraction by the sliding of myosin filaments over actin filaments within muscle fibers

4. tough connective tissue that attaches skeletal muscle to bones of the skeleton

5. human body system that includes all the muscles of the body

6. organs composed mainly of muscle cells

7. the region between two Z lines

8. involuntary, nonstriated muscle that is found in the walls of internal organs such as the stomach

9. organelles contained within each muscle fiber

10. involuntary, striated muscle found only in the walls of the heart

11. tiny structures within the myosin filaments, that can attach to actin filaments

Terms

a. cardiac muscle

b. cross bridges

c. muscle fiber

d. muscles

e. muscular system

f. myofibril

g. sarcomere

h. skeletal muscle

i. sliding filament theory

j. smooth muscle

explanation:

okay now i don't know this but for the pints nothing else to say bye

picture a world where computers are building made-to-order personalized robotic arms and synthetic organs, drones are circulating above mars! due to the rapid growth of technology, the future has never been more unpredictable, and it presents a huge challenge in education: we are teaching students how to work in a future that we have never been unsure of. it is widely predicted that in eight years’ time, there will be more jobs in the fields of science, mathematics, technology and engineering than in any other discipline. and, as the technology continues to develop, it will soon become clear that addressing social problems will involve more innovative thinking, and analytical and technical knowledge than ever before. undeniably, there are no subjects that encourage innovative and creative thinking, deep thought, problem solving and independence more than the stem subjects. while it is widely commented on that there is a need to reimagine the ways stem subjects are taught in schools by embracing a more interactive and innovative approach to appeal to more students, it should come as no surprise that some of the most reputable educational organizations in the world are already implementing changes to embrace stem. harvard, for example, announced in 2014 that they were increasing their computer science faculty by over 50% and has since introduced computer science as a core subject for all freshmen. the urgency of supporting stem subjects at a young age is becoming more relevant than ever, as adopting a keen interest in the curricula needs to happen early. however, beyond the age issue is one of gender.

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they had the law tat factories that produces smoke cannot be built near residential buildings.

building of proper sewage system was done to ensure that the waste is carried away from the humans so that they do not get diseases from it.

also they built water systems to provide water in those areas which are drought prone.

bacteria could be both, harmful and to us. harmful bacteria could make us sick and probably even by getting the chances of getting a disease, but good bacteria fight it off with your immune system. there is always bacteria everywhere we go. we need to make sure to wash our hands after using the restroom, before eating, after eating, after petting an animal too. so you see, bacteria is everywhere and is harmful or . i hope this . : ) : ) : )